StudyBrixFree worksheets, study guides and courses

Grade 6 · Science · curriculum collection

Grade 6 Science, NGSS domains

6 units for Grade 6 science, organised by NGSS disciplinary core idea domain: Physical Sciences, Life Sciences, Earth and Space Sciences. Each unit has a short lesson, a practice worksheet and a review worksheet, both with answer keys.

6 units12 worksheets144 questions with answers
All worksheets (PDF)All answer keys (PDF)Take a diagnostic first

Answer-checked and approved on 29 October 2026

What was checked
  • Every answer is present and well formed: numeric answers parse, choice answers are one of the choices, written questions include a sample answer.
  • Every question is marked correct by the site’s own grader when given its answer, and no wrong choice is marked correct.
  • Every question’s grade range includes the collection’s grade.
  • Every question belongs to its unit’s topic and domain.
  • No question appears twice in a collection.
  • Every worksheet has 10 to 15 questions, and every worksheet and answer key renders.

These checks run automatically on every question before the owner approves a collection. If any question changes, the collection is hidden until it passes the checks and is approved again.

Aligned by StudyBrix at domain level. Not an official publication of, or endorsed by, the standards' authors. Framework: Next Generation Science Standards.

Units in teaching order

01

PS Physical Sciences

Matter & forces

Properties of materials, states of matter, forces and simple measurements of motion and density.

Short lesson: Matter and changes

Study guide for Grades 3 to 7: 20 key ideas, including solid, liquid and gas; 3 practice questions.

A change of state is physical. Heating does not automatically mean a new substance has formed.

  • Solid. A state of matter with a definite shape and volume under ordinary classroom conditions.
  • Liquid. A state of matter with a definite volume that takes the shape of its container.
  • Gas. A state of matter that expands to fill the available container.
  • Melting. A change from solid to liquid.

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. A model vehicle travels 1232 m in 28 s at constant speed. What is its speed in m/s?

  2. Matter and changes: which term fits this description? A change from liquid to solid.

    1. Mass
    2. Freezing
    3. Physical change
    4. Melting

  3. What is the change from liquid water to water vapour called?

    1. Evaporation
    2. Condensation
    3. Freezing
    4. Melting

  4. Which is evidence of diffusion?

    1. A dissolved dye gradually spreads through still water.
    2. A solid gains a name.
    3. A ruler becomes longer on paper.
    4. A scale is switched off.

  5. Which force pulls a dropped ball towards Earth?

    1. Friction only
    2. Gravity
    3. Sound
    4. Magnetism

  6. Which material is generally a good conductor of electricity?

    1. Rubber
    2. Copper
    3. Glass
    4. Dry wood

  7. A model vehicle travels 372 m in 31 s at constant speed. What is its speed in m/s?

  8. Matter and changes: which term fits this description? A state of matter with a definite shape and volume under ordinary classroom conditions.

    1. Liquid
    2. Solid
    3. Sublimation
    4. Freezing

  9. In a solid, particles are best described as

    1. usually kilometres apart
    2. vibrating around relatively fixed positions
    3. having no interactions
    4. completely motionless

  10. A model vehicle travels 368 m in 23 s at constant speed. What is its speed in m/s?

  11. Matter and changes: which term fits this description? A state of matter with a definite volume that takes the shape of its container.

    1. Solid
    2. Solvent
    3. Deposition
    4. Liquid

  12. A sealed jar contains 120 g of water and 5 g of dissolved salt, excluding the jar. What is the solution mass in g?

Answer key
  1. 44 m/s 1232 ÷ 28 = 44 m/s
  2. Freezing Freezing: A change from liquid to solid.
  3. Evaporation
  4. A dissolved dye gradually spreads through still water.
  5. Gravity
  6. Copper
  7. 12 m/s 372 ÷ 31 = 12 m/s
  8. Solid Solid: A state of matter with a definite shape and volume under ordinary classroom conditions.
  9. vibrating around relatively fixed positions
  10. 16 m/s 368 ÷ 23 = 16 m/s
  11. Liquid Liquid: A state of matter with a definite volume that takes the shape of its container.
  12. 125 120 + 5 = 125
Review worksheet: 12 questions

  1. A model vehicle travels 345 m in 15 s at constant speed. What is its speed in m/s?

  2. Matter and changes: which term fits this description? A change from solid to liquid.

    1. Filtration
    2. Solution
    3. Gas
    4. Melting

  3. During melting, which statement best describes a simple particle model?

    1. Particles become less fixed in their arrangement.
    2. All particles split into atoms.
    3. Particles stop moving.
    4. Mass must double.

  4. A model vehicle travels 3648 m in 48 s at constant speed. What is its speed in m/s?

  5. Matter and changes: which term fits this description? Separating insoluble particles from a fluid using a porous barrier.

    1. Filtration
    2. Solution
    3. Solvent
    4. Liquid

  6. Salt dissolves in water. Which conclusion is justified?

    1. The salt no longer exists.
    2. The solution has no mass.
    3. Every atom has changed element.
    4. The salt is dispersed in the solution.

  7. A model vehicle travels 2037 m in 21 s at constant speed. What is its speed in m/s?

  8. Matter and changes: which term fits this description? A state of matter that expands to fill the available container.

    1. Solid
    2. Gas
    3. Condensation
    4. Solution

  9. A gas is compressed more easily than a liquid. Which particle-model feature helps explain this?

    1. Gas particles have no mass.
    2. Gas particles disappear under pressure.
    3. Liquid particles cannot move.
    4. Gas particles have much more space between them.

  10. A model vehicle travels 594 m in 6 s at constant speed. What is its speed in m/s?

  11. Matter and changes: which term fits this description? Mass per unit volume.

    1. Solution
    2. Density
    3. Gas
    4. Evaporation

  12. A sealed container holds liquid water and water vapour. When vapour condenses, what happens to total water mass?

    1. It becomes zero.
    2. It must decrease.
    3. It stays the same if nothing enters or leaves.
    4. It doubles automatically.
Answer key
  1. 23 m/s 345 ÷ 15 = 23 m/s
  2. Melting Melting: A change from solid to liquid.
  3. Particles become less fixed in their arrangement.
  4. 76 m/s 3648 ÷ 48 = 76 m/s
  5. Filtration Filtration: Separating insoluble particles from a fluid using a porous barrier.
  6. The salt is dispersed in the solution.
  7. 97 m/s 2037 ÷ 21 = 97 m/s
  8. Gas Gas: A state of matter that expands to fill the available container.
  9. Gas particles have much more space between them.
  10. 99 m/s 594 ÷ 6 = 99 m/s
  11. Density Density: Mass per unit volume.
  12. It stays the same if nothing enters or leaves.

Related ready-made worksheets: Grade 6 Matter & forces worksheet

02

PS Physical Sciences

Motion & graphs

Distance, displacement, speed, velocity and acceleration.

Short lesson: Distance is not displacement

Study guide for Grades 6 to 9: 4 key ideas, including path length, change in position and round trips; 2 worked examples and 3 practice questions. Use paths and signed positions to explain round trips.

  • Path length. Distance is the total length travelled and is non-negative.
  • Change in position. Displacement is final position minus initial position and includes a direction or sign.
  • Round trips. Returning to the start makes displacement zero, but travelled distance need not be zero.
  • State the reference. Define your origin and positive direction before calculating signed displacement.

Worked example

A learner walks 9 m east, then 4 m west on one line. Find total distance.

Distance adds both path lengths: 9 + 4 = 13 m.

Answer: 13 m

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. An object begins at +12 m and ends at +3 m. Find signed displacement.

  2. A rover travels 246 m in 33 s, then 203 m in 38 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  3. A robot moves 74 m east and then 67 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  4. A learner walks 9 m east, then 4 m west on one line. Find total distance.

  5. A rover travels 184 m in 21 s, then 44 m in 32 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  6. A robot moves 44 m east and then 18 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  7. Which quantity needs a direction or sign in one dimension?

    1. Elapsed time
    2. Displacement
    3. Distance

  8. A rover travels 398 m in 26 s, then 162 m in 61 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  9. A robot moves 109 m east and then 56 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  10. On a signed axis, x changes from −6 m to +8 m. Find displacement.

  11. A rover travels 96 m in 21 s, then 329 m in 52 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  12. A robot moves 146 m east and then 11 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

Answer key
  1. -9 m 3 − 12 = −9 m on the chosen axis.
  2. 6.324 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (246 + 203) / (33 + 38) = 6.324
  3. 141 m distance = forward path + return path 74 + 67 = 141
  4. 13 m Distance adds both path lengths: 9 + 4 = 13 m.
  5. 4.302 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (184 + 44) / (21 + 32) = 4.302
  6. 62 m distance = forward path + return path 44 + 18 = 62
  7. Displacement Displacement is a vector quantity, represented by a sign on a one-dimensional axis.
  8. 6.437 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (398 + 162) / (26 + 61) = 6.437
  9. 165 m distance = forward path + return path 109 + 56 = 165
  10. 14 m Subtract initial from final: 8 − (−6) = 14 m.
  11. 5.822 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (96 + 329) / (21 + 52) = 5.822
  12. 157 m distance = forward path + return path 146 + 11 = 157
Review worksheet: 12 questions

  1. A rover travels 397 m in 16 s, then 163 m in 30 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  2. A robot moves 69 m east and then 56 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  3. Why is a negative displacement not a negative distance travelled?

  4. A rover travels 397 m in 12 s, then 297 m in 30 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  5. A robot moves 127 m east and then 107 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  6. A runner returns to the start after one complete lap. Which is zero?

    1. Elapsed time necessarily
    2. Displacement
    3. Distance travelled

  7. A rover travels 338 m in 69 s, then 259 m in 14 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  8. A robot moves 59 m east and then 9 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  9. Can two journeys have equal displacement and different distances? Give an example.

  10. A rover travels 331 m in 80 s, then 22 m in 56 s. Find its average speed for both stages. Round to 3 decimal places if needed. Answer in m/s.

  11. A robot moves 97 m east and then 90 m west along a straight line. Find the total distance travelled. Round to 3 decimal places if needed. Answer in m.

  12. For the same 9 m east and 4 m west trip, use east-positive. Find displacement.

Answer key
  1. 12.174 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (397 + 163) / (16 + 30) = 12.174
  2. 125 m distance = forward path + return path 69 + 56 = 125
  3. The minus sign identifies direction, not a negative path length. Credit the scalar/vector distinction without requiring these exact terms.
  4. 16.524 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (397 + 297) / (12 + 30) = 16.524
  5. 234 m distance = forward path + return path 127 + 107 = 234
  6. Displacement Final and initial positions coincide, so displacement is zero.
  7. 7.193 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (338 + 259) / (69 + 14) = 7.193
  8. 68 m distance = forward path + return path 59 + 9 = 68
  9. Yes. A direct 5 m trip and a 9 m forward, 4 m backward trip both end 5 m ahead. Credit same endpoints and different path lengths.
  10. 2.596 m/s v̄ = (d₁ + d₂)/(t₁ + t₂) (331 + 22) / (80 + 56) = 2.596
  11. 187 m distance = forward path + return path 97 + 90 = 187
  12. 5 m Signed displacement is +9 − 4 = +5 m.

Related ready-made worksheets: Grade 6 Motion & graphs worksheet

03

PS Physical Sciences

Forces & equilibrium

Pushes, pulls, balanced and unbalanced forces, springs and Newton's laws.

Short lesson: Weight in a given field

Study guide for Grades 6 to 10: 2 worked examples and 2 practice questions. Mass is measured in kg; weight is a force measured in N.

Fᵍ = mg

Mass is measured in kg; weight is a force measured in N.

Worked example

A mass of 86 kg is in a model gravitational field of 10 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

Fᵍ = mg 86 × 10 = 860

Answer: 860 N

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. A mass of 47 kg is in a model gravitational field of 1.6 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  2. Which SI unit is used for mass?

    1. kg
    2. N/kg
    3. N

  3. A mass of 60 kg is in a model gravitational field of 10 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  4. Why should a problem state which g value to use?

  5. A mass of 29 kg is in a model gravitational field of 1.6 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  6. Explain why 60 kg is not a correctly stated weight in an SI force calculation.

  7. A mass of 55 kg is in a model gravitational field of 1.6 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  8. A 10 kg object is in a model field of 1.6 N/kg. Find weight.

  9. A mass of 46 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  10. If an unchanged object moves to a weaker gravitational field, what usually changes?

    1. Its mass necessarily
    2. Its number of protons necessarily
    3. Its weight

  11. A mass of 2 kg is in a model gravitational field of 10 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  12. A mass weighs 32 N in a field of 8 N/kg. Find mass.

Answer key
  1. 75.2 N Fᵍ = mg 47 × 1.6 = 75.2
  2. kg Kilogram measures mass; newton measures force.
  3. 600 N Fᵍ = mg 60 × 10 = 600
  4. The field can differ by location, and approximations such as 10 or 9.8 affect the result. Credit location or stated numerical approximation.
  5. 46.4 N Fᵍ = mg 29 × 1.6 = 46.4
  6. Kilograms measure mass; weight as a force should be given in newtons. Credit the units distinction without criticizing everyday language outside the calculation.
  7. 88 N Fᵍ = mg 55 × 1.6 = 88
  8. 16 N 10 × 1.6 = 16 N.
  9. 170.2 N Fᵍ = mg 46 × 3.7 = 170.2
  10. Its weight Weight depends on field strength while the object's mass can remain the same.
  11. 20 N Fᵍ = mg 2 × 10 = 20
  12. 4 kg m = W/g = 32/8 = 4 kg.
Review worksheet: 12 questions

  1. A mass of 80 kg is in a model gravitational field of 9.8 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  2. A 6 kg mass is in a field of 10 N/kg. Find weight.

  3. A mass of 19 kg is in a model gravitational field of 9.8 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  4. A gravitational field strength of 9.8 N/kg is numerically equivalent to which acceleration unit?

    1. 9.8 m/s²
    2. 9.8 kg/s
    3. 9.8 m²/s

  5. A mass of 72 kg is in a model gravitational field of 1.6 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  6. A mass of 91 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  7. A mass of 66 kg is in a model gravitational field of 9.8 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  8. A mass of 28 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  9. A mass of 5 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  10. A mass of 90 kg is in a model gravitational field of 1.6 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  11. A mass of 22 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

  12. A mass of 98 kg is in a model gravitational field of 3.7 N/kg. Find its weight. Round to 3 decimal places if needed. Answer in N.

Answer key
  1. 784 N Fᵍ = mg 80 × 9.8 = 784
  2. 60 N W = mg = 6 × 10 = 60 N.
  3. 186.2 N Fᵍ = mg 19 × 9.8 = 186.2
  4. 9.8 m/s² N/kg simplifies to m/s².
  5. 115.2 N Fᵍ = mg 72 × 1.6 = 115.2
  6. 336.7 N Fᵍ = mg 91 × 3.7 = 336.7
  7. 646.8 N Fᵍ = mg 66 × 9.8 = 646.8
  8. 103.6 N Fᵍ = mg 28 × 3.7 = 103.6
  9. 18.5 N Fᵍ = mg 5 × 3.7 = 18.5
  10. 144 N Fᵍ = mg 90 × 1.6 = 144
  11. 81.4 N Fᵍ = mg 22 × 3.7 = 81.4
  12. 362.6 N Fᵍ = mg 98 × 3.7 = 362.6

Related ready-made worksheets: Grade 6 Forces & equilibrium worksheet

04

LS Life Sciences

Plant biology

Plant parts, what plants need, photosynthesis and plant reproduction.

Short lesson: Germination percentage

Study guide for Grades 5 to 9: 2 worked examples and 2 practice questions. Divide germinated seeds by all tested seeds, including those that did not germinate.

percentage = germinated/tested × 100

Divide germinated seeds by all tested seeds, including those that did not germinate.

Worked example

In supplied data, 58 of 100 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

percentage = germinated/tested × 100 58/100 × 100 = 58

Answer: 58 %

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. In supplied data, 7 of 157 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  2. A sample has 40 seeds and 30 germinate under the stated test conditions. Find the germination percentage.

  3. In supplied data, 200 of 200 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  4. Must pollination always be carried out by insects?

    1. No; wind and other agents can be involved.
    2. Only if a flower is yellow.
    3. Yes, all plants use bees.

  5. In supplied data, 35 of 91 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  6. Which conclusion is justified by 30 of 40 tested seeds germinating?

    1. Exactly 75% of all future seeds everywhere will germinate.
    2. 75% germinated in this tested sample and conditions.
    3. The other seeds are certainly all dead.

  7. In supplied data, 57 of 61 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  8. Which event is pollination?

    1. Every seed germinating.
    2. Pollen reaching a receptive stigma.
    3. Roots absorbing water.

  9. In supplied data, 64 of 71 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  10. Why is a seed not the same thing as pollen?

  11. In supplied data, 6 of 122 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  12. What does dispersal describe?

    1. Movement of seeds or other reproductive units away from their source.
    2. Only DNA copying.
    3. Always gamete fusion.
Answer key
  1. 4.459 % percentage = germinated/tested × 100 7/157 × 100 = 4.459
  2. 75 % 30/40 × 100 = 75%.
  3. 100 % percentage = germinated/tested × 100 200/200 × 100 = 100
  4. No; wind and other agents can be involved. Pollination mechanisms vary.
  5. 38.462 % percentage = germinated/tested × 100 35/91 × 100 = 38.462
  6. 75% germinated in this tested sample and conditions. Limit the conclusion to the evidence.
  7. 93.443 % percentage = germinated/tested × 100 57/61 × 100 = 93.443
  8. Pollen reaching a receptive stigma. Pollination is pollen transfer, not fertilization itself.
  9. 90.141 % percentage = germinated/tested × 100 64/71 × 100 = 90.141
  10. A seed contains an embryo after reproductive development; pollen has a different role in reproduction. Keep the biological stages distinct.
  11. 4.918 % percentage = germinated/tested × 100 6/122 × 100 = 4.918
  12. Movement of seeds or other reproductive units away from their source. Dispersal concerns location changes.
Review worksheet: 12 questions

  1. In supplied data, 46 of 49 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  2. Why should the conditions of a germination test be reported?

  3. In supplied data, 7 of 46 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  4. Which event is fertilization?

    1. Fusion of gametes.
    2. Only petals opening.
    3. Only wind moving a seed.

  5. In supplied data, 21 of 65 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  6. In supplied data, 163 of 188 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  7. In supplied data, 75 of 142 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  8. In supplied data, 49 of 156 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  9. In supplied data, 22 of 52 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  10. In supplied data, 22 of 40 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  11. In supplied data, 86 of 99 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

  12. In supplied data, 20 of 158 seeds germinated under the stated test conditions. Find the sample germination percentage. Round to 3 decimal places if needed. Answer in %.

Answer key
  1. 93.878 % percentage = germinated/tested × 100 46/49 × 100 = 93.878
  2. Water, temperature, oxygen, dormancy and other factors can affect the result. A test percentage is condition-dependent.
  3. 15.217 % percentage = germinated/tested × 100 7/46 × 100 = 15.217
  4. Fusion of gametes. Fertilization combines genetic material through gamete fusion.
  5. 32.308 % percentage = germinated/tested × 100 21/65 × 100 = 32.308
  6. 86.702 % percentage = germinated/tested × 100 163/188 × 100 = 86.702
  7. 52.817 % percentage = germinated/tested × 100 75/142 × 100 = 52.817
  8. 31.41 % percentage = germinated/tested × 100 49/156 × 100 = 31.41
  9. 42.308 % percentage = germinated/tested × 100 22/52 × 100 = 42.308
  10. 55 % percentage = germinated/tested × 100 22/40 × 100 = 55
  11. 86.869 % percentage = germinated/tested × 100 86/99 × 100 = 86.869
  12. 12.658 % percentage = germinated/tested × 100 20/158 × 100 = 12.658

Related ready-made worksheets: Grade 6 Plant biology worksheet

05

LS Life Sciences

Biology & genetics

Cells, ecosystems, food webs and genetics.

Short lesson: Cells and cell structures

Study guide for Grades 6 to 10: 20 key ideas, including cell membrane, cytoplasm and nucleus; 3 practice questions.

Do not assume every cell has every organelle. Bacterial cells have ribosomes but no membrane-bound nucleus.

  • Cell membrane. The selectively permeable boundary around a cell.
  • Cytoplasm. The cell contents inside the membrane, excluding the nucleus in a eukaryotic cell.
  • Nucleus. The membrane-bound structure that contains most DNA in a eukaryotic cell.
  • Ribosome. The cellular structure where proteins are assembled.

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. Cells and cell structures: which term fits this description? The selectively permeable boundary around a cell.

    1. Active transport
    2. Cell wall
    3. Cell membrane
    4. Chromosome

  2. In grass → rabbit → fox, what does the first arrow represent?

    1. the direction of wind
    2. food or energy transfer from grass to rabbit
    3. rabbit turning into grass
    4. grass hunting the rabbit

  3. Ecosystems and interactions: which term fits this description? The protection and responsible management of natural systems and biodiversity.

    1. Conservation
    2. Competition
    3. Community
    4. Natural selection

  4. Cells and cell structures: which term fits this description? A membrane-bound compartment used for storage and other functions in cells.

    1. Osmosis
    2. Vacuole
    3. Chromosome
    4. Eukaryote

  5. Why is a food web often more informative than a single food chain?

  6. Ecosystems and interactions: which term fits this description? The population size an environment can sustain under particular conditions.

    1. Parasitism
    2. Commensalism
    3. Carrying capacity
    4. Decomposer

  7. Cells and cell structures: which term fits this description? An organized DNA-containing structure carrying genetic information.

    1. Chromosome
    2. Cell wall
    3. Active transport
    4. Ribosome

  8. Is water temperature a living or nonliving environmental factor?

  9. Ecosystems and interactions: which term fits this description? All interacting populations in an area.

    1. Commensalism
    2. Community
    3. Food chain
    4. Adaptation

  10. Cells and cell structures: which term fits this description? Regulation that keeps internal conditions within a workable range.

    1. Homeostasis
    2. Cell membrane
    3. Osmosis
    4. Cytoplasm

  11. Fewer rabbits are recorded this year. Give one reason not to conclude immediately that foxes caused the decline.

  12. Ecosystems and interactions: which term fits this description? An interaction between species in which both participants benefit.

    1. Conservation
    2. Mutualism
    3. Extinction
    4. Abiotic factor
Answer key
  1. Cell membrane Cell membrane: The selectively permeable boundary around a cell.
  2. food or energy transfer from grass to rabbit
  3. Conservation Conservation: The protection and responsible management of natural systems and biodiversity.
  4. Vacuole Vacuole: A membrane-bound compartment used for storage and other functions in cells.
  5. It represents multiple feeding links and possible alternative food sources.
  6. Carrying capacity Carrying capacity: The population size an environment can sustain under particular conditions.
  7. Chromosome Chromosome: An organized DNA-containing structure carrying genetic information.
  8. nonliving
  9. Community Community: All interacting populations in an area.
  10. Homeostasis Homeostasis: Regulation that keeps internal conditions within a workable range.
  11. Other causes such as food supply, disease, weather, migration or sampling differences may also explain it.
  12. Mutualism Mutualism: An interaction between species in which both participants benefit.
Review worksheet: 12 questions

  1. Cells and cell structures: which term fits this description? A group of cells working together in a particular function.

    1. Tissue
    2. Diffusion
    3. Chromosome
    4. Mitochondrion

  2. Ecosystems and interactions: which term fits this description? A single sequence showing transfer through feeding relationships.

    1. Abiotic factor
    2. Commensalism
    3. Food chain
    4. Population

  3. In grass → rabbit → fox, which organism is the producer?

    1. rabbit
    2. fox
    3. grass
    4. all three

  4. Cells and cell structures: which term fits this description? The molecule that stores hereditary information in cells.

    1. DNA
    2. Diffusion
    3. Tissue
    4. Chloroplast

  5. Ecosystems and interactions: which term fits this description? Members of one species living in a particular area at a particular time.

    1. Parasitism
    2. Population
    3. Producer
    4. Extinction

  6. A pond loses many water plants. Which claim is most defensible from this fact alone?

    1. Several food and habitat relationships may be affected.
    2. No other organism can be affected.
    3. Every fish will immediately die.
    4. The exact fish count is now known.

  7. Cells and cell structures: which term fits this description? An organism whose cells lack a membrane-bound nucleus.

    1. Prokaryote
    2. Eukaryote
    3. Chloroplast
    4. Vacuole

  8. Ecosystems and interactions: which term fits this description? An interaction in which one organism benefits and the other is not substantially affected.

    1. Extinction
    2. Commensalism
    3. Carrying capacity
    4. Conservation

  9. A species eats both plant material and animals. Which description fits?

    1. only producer
    2. only herbivore
    3. nonliving factor
    4. omnivore

  10. Cells and cell structures: which term fits this description? An organism whose cells contain a membrane-bound nucleus.

    1. Osmosis
    2. Eukaryote
    3. Chromosome
    4. Organ system

  11. Ecosystems and interactions: which term fits this description? A living component or biological influence in an environment.

    1. Parasitism
    2. Mutualism
    3. Consumer
    4. Biotic factor

  12. Explain why decomposers matter even though they are often left out of simple food chains.

Answer key
  1. Tissue Tissue: A group of cells working together in a particular function.
  2. Food chain Food chain: A single sequence showing transfer through feeding relationships.
  3. grass
  4. DNA DNA: The molecule that stores hereditary information in cells.
  5. Population Population: Members of one species living in a particular area at a particular time.
  6. Several food and habitat relationships may be affected.
  7. Prokaryote Prokaryote: An organism whose cells lack a membrane-bound nucleus.
  8. Commensalism Commensalism: An interaction in which one organism benefits and the other is not substantially affected.
  9. omnivore
  10. Eukaryote Eukaryote: An organism whose cells contain a membrane-bound nucleus.
  11. Biotic factor Biotic factor: A living component or biological influence in an environment.
  12. They break down dead material and waste and help return nutrients to the environment.

Related ready-made worksheets: Grade 6 Biology & genetics worksheet

06

ESS Earth and Space Sciences

Earth & space

The Sun, Moon and planets, day and night, the water cycle and Earth's layers.

Short lesson: Earth systems

Study guide for Grades 4 to 9: 20 key ideas, including crust, mantle and outer core; 3 practice questions.

Weathering breaks material down; erosion transports it. These processes can happen together, but they are not the same.

  • Crust. Earth's thin outermost solid rocky layer.
  • Mantle. The thick rocky region between Earth's crust and core.
  • Outer core. The mostly liquid metallic layer surrounding Earth's inner core.
  • Inner core. Earth's solid central metallic region.

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. Why is Earth's shadow not the usual explanation for crescent Moon phases?

  2. Space and the solar system: which term fits this description? A small icy solar-system body that can release gas and dust near the Sun.

    1. Moon
    2. Solar eclipse
    3. Comet
    4. Venus

  3. Water vapour forming liquid droplets is

    1. erosion
    2. condensation
    3. freezing in every case
    4. evaporation

  4. Earth systems: which term fits this description? Removal and transport of material by agents such as water, wind or ice.

    1. Erosion
    2. Magma
    3. Inner core
    4. Outer core

  5. Water soaking into soil is called

    1. cloud reflection
    2. condensation
    3. infiltration
    4. melting

  6. Why should a solar-angle diagram state the location and time of year?

  7. What can transform existing rock without fully melting it?

    1. Removing every atom.
    2. Heat and pressure during metamorphism.
    3. Only writing a new label.

  8. Earth's daily rotation mainly explains

    1. the cycle of day and night
    2. the shape of every cloud
    3. all Moon craters
    4. why all seasons are equally warm

  9. Space and the solar system: which term fits this description? Earth's natural satellite.

    1. Moon
    2. Lunar eclipse
    3. Venus
    4. Mercury

  10. Temperatures are 12, 16, 14 and 18 °C. Find the mean in °C.

  11. Earth systems: which term fits this description? Water falling from clouds as rain, snow or other forms.

    1. Igneous rock
    2. Precipitation
    3. Inner core
    4. Sedimentary rock

  12. A puddle disappears on a dry day. Does that mean its water no longer exists? Explain.

Answer key
  1. Ordinary phases reflect our view of the sunlit half. Earth's shadow is involved in lunar eclipses, not the normal phase cycle. Credit the distinction between phase geometry and an eclipse.
  2. Comet Comet: A small icy solar-system body that can release gas and dust near the Sun.
  3. condensation
  4. Erosion Erosion: Removal and transport of material by agents such as water, wind or ice.
  5. infiltration It enters the ground from the surface.
  6. The geometry depends on latitude and orbital position. A single drawing does not describe every location simultaneously.
  7. Heat and pressure during metamorphism. Metamorphic change occurs under changed conditions without complete melting in the basic distinction.
  8. the cycle of day and night Different parts of Earth turn toward and away from sunlight.
  9. Moon Moon: Earth's natural satellite.
  10. 15 (12 + 16 + 14 + 18)/4 = 15
  11. Precipitation Precipitation: Water falling from clouds as rain, snow or other forms.
  12. No. Much may have evaporated or infiltrated, moving to another place or state. Credit conservation and a plausible pathway.
Review worksheet: 12 questions

  1. Space and the solar system: which term fits this description? An event in which the Moon blocks our view of part or all of the Sun.

    1. Moon
    2. Uranus
    3. Solar eclipse
    4. Galaxy

  2. Why is the water cycle better shown as connected pathways than one single circle?

  3. Earth systems: which term fits this description? The model describing movement and interaction of Earth's lithospheric plates.

    1. Lava
    2. Plate tectonics
    3. Erosion
    4. Precipitation

  4. Rainfall on four days is 2, 0, 5 and 3 mm. Find the total rainfall in mm.

  5. The Moon is visible mainly because it

    1. burns like a star
    2. reflects only city lights
    3. has electric lamps
    4. reflects sunlight

  6. Should a model use a light beam as a safe instruction to look directly at the Sun?

    1. Only at midday.
    2. Yes, for better detail.
    3. No.

  7. Why can a rock contain several different minerals?

  8. Space and the solar system: which term fits this description? A relatively small rocky or metallic body orbiting the Sun.

    1. Galaxy
    2. Revolution
    3. Mars
    4. Asteroid

  9. How could paving a previously grassy area change the route taken by rainwater?

  10. Earth systems: which term fits this description? Rock formed from deposited material or chemical precipitation that becomes consolidated.

    1. Sedimentary rock
    2. Water cycle
    3. Mantle
    4. Metamorphic rock

  11. Which record best supports a local climate comparison?

    1. one photograph
    2. one opinion
    3. one lunchtime temperature
    4. many years of consistently measured observations

  12. Waxing describes a visible illuminated portion that is

    1. increasing
    2. always absent
    3. permanently frozen
    4. decreasing
Answer key
  1. Solar eclipse Solar eclipse: An event in which the Moon blocks our view of part or all of the Sun.
  2. Water can be stored in many places and move through different routes, including groundwater and ice. Credit multiple possible pathways or different storage times.
  3. Plate tectonics Plate tectonics: The model describing movement and interaction of Earth's lithospheric plates.
  4. 10 2 + 0 + 5 + 3 = 10
  5. reflects sunlight Sunlight reflected from its surface reaches us.
  6. No. Never look directly at the Sun for this activity; use diagrams or safe supplied data.
  7. Rocks can be aggregates of multiple mineral components. Rock and mineral are not interchangeable terms.
  8. Asteroid Asteroid: A relatively small rocky or metallic body orbiting the Sun.
  9. It may reduce infiltration and increase or redirect surface runoff, depending on drainage. Avoid claiming that all rain follows one route.
  10. Sedimentary rock Sedimentary rock: Rock formed from deposited material or chemical precipitation that becomes consolidated.
  11. many years of consistently measured observations
  12. increasing Waxing refers to the growing lit fraction seen from Earth.

Related ready-made worksheets: Grade 6 Earth & space worksheet