Grade 4 · Science · curriculum collection
Grade 4 Science, NGSS domains
6 units for Grade 4 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.
Answer-checked and approved on 29 October 2026
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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
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.
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
Why can a very strong material still be unsuitable for a task?
Why compare the same toy on two surfaces rather than changing both toy and surface?
Matter and changes: which term fits this description? A change in form or state without forming a different chemical substance.
- Physical change
- Solvent
- Melting
- Conductor
What is the change from liquid water to water vapour called?
- Evaporation
- Condensation
- Freezing
- Melting
Which material is generally a good conductor of electricity?
- Rubber
- Copper
- Glass
- Dry wood
Which force pulls a dropped ball towards Earth?
- Friction only
- Gravity
- Sound
- Magnetism
Which observation is more specific?
- The material looks successful.
- The material absorbed 5 mL in the stated test.
- The material is definitely perfect.
A toy stops after being pushed. Why does that not show it has used up a substance called force?
Matter and changes: which term fits this description? A measure of an object's inertia, expressed in kilograms in SI.
- Mass
- Density
- Conductor
- Gas
Which property matters most for a rain-cover material?
- Whether a friend likes its color.
- The first letter of its name.
- Resistance to water passage.
A rough surface may slow a sliding object through
- pollination
- photosynthesis
- friction
- condensation
Matter and changes: which term fits this description? The three-dimensional space occupied by an object or substance.
- Evaporation
- Melting
- Volume
- Density
Answer key
- It might be too heavy, costly, inflexible or unsafe for the context. A design balances several constraints.
- Keeping the toy the same helps isolate the effect of the surface.
- Physical change Physical change: A change in form or state without forming a different chemical substance.
- Evaporation
- Copper
- Gravity
- The material absorbed 5 mL in the stated test. A measured result with conditions is more informative.
- Forces are interactions, not stored fuel; opposing forces such as friction change the toy’s motion.
- Mass Mass: A measure of an object's inertia, expressed in kilograms in SI.
- Resistance to water passage. A rain cover should limit water entering.
- friction
- Volume Volume: The three-dimensional space occupied by an object or substance.
Review worksheet: 12 questions
Matter and changes: which term fits this description? A state of matter that expands to fill the available container.
- Solid
- Gas
- Condensation
- Solution
Which is a simple inclined plane?
- a stopwatch
- a thermometer
- a ramp
- a cloud
Does bending a wire necessarily create a new chemical substance?
- Yes, every shape change does.
- No.
- Only if it is long.
Matter and changes: which term fits this description? A state of matter with a definite volume that takes the shape of its container.
- Solid
- Solvent
- Deposition
- Liquid
Give an example in which a force changes an object’s shape without moving it across a room.
Name two properties to consider for a carrying bag.
Matter and changes: which term fits this description? A change from gas to liquid.
- Mixture
- Volume
- Deposition
- Condensation
Moving a toy away with your hand is mainly a
- evaporation
- freeze
- push
- reflection
One sample has mass 12 g and another 19 g. How much heavier is the second?
Matter and changes: which term fits this description? A homogeneous mixture in which components are dispersed at molecular or ionic scale.
- Solute
- Physical change
- Conductor
- Solution
A stretched elastic band changes
- its name only
- the number written on it only
- shape
- the day of the week
Why compare equal-size strips in a simple strength comparison?
- Size never affects performance.
- Size can influence the result.
- It removes all measurement uncertainty.
Answer key
- Gas Gas: A state of matter that expands to fill the available container.
- a ramp
- No. A shape change can be physical.
- Liquid Liquid: A state of matter with a definite volume that takes the shape of its container.
- Accept squeezing a sponge, stretching an elastic band or another appropriate example.
- Strength and mass, or water resistance and flexibility. Accept properties tied to the intended use.
- Condensation Condensation: A change from gas to liquid.
- push
- 7 g 19 − 12 = 7 g.
- Solution Solution: A homogeneous mixture in which components are dispersed at molecular or ionic scale.
- shape
- Size can influence the result. The comparison should control geometry.
PS Physical Sciences
Waves & sound
Wave speed, frequency, period and sound.
Short lesson: Sound and vibrations
Study guide for Grades 1 to 4: 2 worked examples and 2 practice questions. Sounds come from vibrations. Loudness depends on how big the vibrations are; pitch depends on how fast they are.
vibration → sound; bigger vibration → louder
Sounds come from vibrations. Loudness depends on how big the vibrations are; pitch depends on how fast they are.
Worked example
A drum is tapped gently and then hit harder. What happens to the sound?
A harder hit makes bigger vibrations and a louder sound.
Answer: It gets louder.
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
Which sound is louder: a cat purring or a lawn mower?
- a cat purring
- a lawn mower
Give an example of a sound source and the part that vibrates.
Which sound is quieter: a pencil writing on paper or a marching band drum?
- a marching band drum
- a pencil writing on paper
A quiet whistle and a loud drum can differ in which two ways?
- Only colour
- Neither sound property
- Both pitch and loudness
Which sound is quieter: a fire truck siren or rustling leaves?
- a fire truck siren
- rustling leaves
Why is pressing an ear close to a loud speaker a poor investigation method?
Which sound is quieter: a whisper or a lawn mower?
- a whisper
- a lawn mower
Which observation supports the idea that a ruler can vibrate?
- Its paint is blue.
- Its numbers are printed in black.
- Its free end moves rapidly back and forth.
Which sound is quieter: a whisper or a jet plane taking off?
- a jet plane taking off
- a whisper
Which can carry ordinary sound across a classroom?
- Air
- Only visible light
- A perfect vacuum
Which sound is quieter: a pencil writing on paper or a lawn mower?
- a lawn mower
- a pencil writing on paper
Does hearing a bell mean small pieces of metal travel into your ear?
Answer key
- a lawn mower A lawn mower is a loud sound; a cat purring is a quiet sound.
- For example, a guitar string vibrates after being plucked. Credit a plausible source and correctly identified vibrating part.
- a pencil writing on paper A marching band drum is a loud sound; a pencil writing on paper is a quiet sound.
- Both pitch and loudness The sounds can differ in pitch and loudness independently.
- rustling leaves A fire truck siren is a loud sound; rustling leaves is a quiet sound.
- It may be unsafe for hearing; a quieter controlled observation is better. Credit hearing safety and a lower-intensity alternative, not exposure testing.
- a whisper A lawn mower is a loud sound; a whisper is a quiet sound.
- Its free end moves rapidly back and forth. Repeated motion is evidence of vibration rather than just appearance.
- a whisper A jet plane taking off is a loud sound; a whisper is a quiet sound.
- Air Sound propagates through a material medium such as air.
- a pencil writing on paper A lawn mower is a loud sound; a pencil writing on paper is a quiet sound.
- No. Vibrations transfer through the air; pieces of bell do not need to travel. Look for distinction between a wave disturbance and bulk transport of the source.
Review worksheet: 12 questions
Which sound is quieter: a fire truck siren or a cat purring?
- a cat purring
- a fire truck siren
Which pair describes two different sound properties?
- Pitch and height of the table
- Loudness and pitch
- Loudness and loudness
Which sound is quieter: a lawn mower or a pencil writing on paper?
- a pencil writing on paper
- a lawn mower
A gently plucked elastic band moves back and forth. What is that motion called?
- Vibration
- Melting
- Orbiting
A drum is tapped gently and then hit harder. What happens to the sound?
- It gets louder.
- It gets quieter.
- It stops.
Which sound is quieter: a jet plane taking off or a cat purring?
- a jet plane taking off
- a cat purring
Which sound is louder: a whisper or a jet plane taking off?
- a jet plane taking off
- a whisper
Which sound is louder: rustling leaves or a marching band drum?
- rustling leaves
- a marching band drum
Which sound is louder: a pencil writing on paper or a lawn mower?
- a pencil writing on paper
- a lawn mower
Which sound is louder: a thunderclap or a ticking watch?
- a thunderclap
- a ticking watch
Which sound is quieter: a marching band drum or a pencil writing on paper?
- a marching band drum
- a pencil writing on paper
Which sound is quieter: a ticking watch or a marching band drum?
- a ticking watch
- a marching band drum
Answer key
- a cat purring A fire truck siren is a loud sound; a cat purring is a quiet sound.
- Loudness and pitch Pitch relates to perceived frequency; loudness relates to perception of sound strength.
- a pencil writing on paper A lawn mower is a loud sound; a pencil writing on paper is a quiet sound.
- Vibration Repeated back-and-forth motion is vibration.
- It gets louder. A harder hit makes bigger vibrations and a louder sound.
- a cat purring A jet plane taking off is a loud sound; a cat purring is a quiet sound.
- a jet plane taking off A jet plane taking off is a loud sound; a whisper is a quiet sound.
- a marching band drum A marching band drum is a loud sound; rustling leaves is a quiet sound.
- a lawn mower A lawn mower is a loud sound; a pencil writing on paper is a quiet sound.
- a thunderclap A thunderclap is a loud sound; a ticking watch is a quiet sound.
- a pencil writing on paper A marching band drum is a loud sound; a pencil writing on paper is a quiet sound.
- a ticking watch A marching band drum is a loud sound; a ticking watch is a quiet sound.
PS Physical Sciences
Light & optics
Light, shadows, reflection, refraction and lenses.
Short lesson: Light and shadows
Study guide for Grades 1 to 4: 2 worked examples and 2 practice questions. Sort objects: does it make its own light? Does light pass through it (transparent) or is it blocked (opaque)?
light travels in straight lines; opaque objects block it
Sort objects: does it make its own light? Does light pass through it (transparent) or is it blocked (opaque)?
Worked example
Which one lets light pass through so you can see clearly through it: clear window glass or a thick book?
Clear window glass is transparent: light passes through it. A thick book is opaque: it blocks light and can make a shadow.
Answer: clear window glass
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
Which one makes its own light: a white sheet of paper or a lamp that is switched on?
- a lamp that is switched on
- a white sheet of paper
Which one lets light pass through so you can see clearly through it: a wooden door or clean water in a glass?
- a wooden door
- clean water in a glass
Which one makes its own light: a flashlight that is on or a white sheet of paper?
- a flashlight that is on
- a white sheet of paper
Which one lets light pass through so you can see clearly through it: clear plastic wrap or a metal pan?
- a metal pan
- clear plastic wrap
Which one lets light pass through so you can see clearly through it: clear plastic wrap or a brick wall?
- clear plastic wrap
- a brick wall
Which one makes its own light: a mirror or a firefly?
- a firefly
- a mirror
Which one makes its own light: a white sheet of paper or a firefly?
- a firefly
- a white sheet of paper
Which one makes its own light: a shiny spoon or a lamp that is switched on?
- a lamp that is switched on
- a shiny spoon
Which one lets light pass through so you can see clearly through it: a cardboard box or clear plastic wrap?
- a cardboard box
- clear plastic wrap
Which one lets light pass through so you can see clearly through it: a thick book or clean water in a glass?
- clean water in a glass
- a thick book
Which one lets light pass through so you can see clearly through it: clear window glass or a metal pan?
- clear window glass
- a metal pan
Which one makes its own light: a mirror or the Sun?
- a mirror
- the Sun
Answer key
- a lamp that is switched on A lamp that is switched on gives off its own light. A white sheet of paper only reflects light that shines on it.
- clean water in a glass Clean water in a glass is transparent: light passes through it. A wooden door is opaque: it blocks light and can make a shadow.
- a flashlight that is on A flashlight that is on gives off its own light. A white sheet of paper only reflects light that shines on it.
- clear plastic wrap Clear plastic wrap is transparent: light passes through it. A metal pan is opaque: it blocks light and can make a shadow.
- clear plastic wrap Clear plastic wrap is transparent: light passes through it. A brick wall is opaque: it blocks light and can make a shadow.
- a firefly A firefly gives off its own light. A mirror only reflects light that shines on it.
- a firefly A firefly gives off its own light. A white sheet of paper only reflects light that shines on it.
- a lamp that is switched on A lamp that is switched on gives off its own light. A shiny spoon only reflects light that shines on it.
- clear plastic wrap Clear plastic wrap is transparent: light passes through it. A cardboard box is opaque: it blocks light and can make a shadow.
- clean water in a glass Clean water in a glass is transparent: light passes through it. A thick book is opaque: it blocks light and can make a shadow.
- clear window glass Clear window glass is transparent: light passes through it. A metal pan is opaque: it blocks light and can make a shadow.
- the Sun The Sun gives off its own light. A mirror only reflects light that shines on it.
Review worksheet: 12 questions
Which one makes its own light: a firefly or the Moon?
- the Moon
- a firefly
Which one lets light pass through so you can see clearly through it: clear window glass or a wooden door?
- a wooden door
- clear window glass
Which one lets light pass through so you can see clearly through it: a thick book or clear plastic wrap?
- a thick book
- clear plastic wrap
Which one lets light pass through so you can see clearly through it: clear window glass or a brick wall?
- a brick wall
- clear window glass
Which one makes its own light: a shiny spoon or a flashlight that is on?
- a flashlight that is on
- a shiny spoon
Which one makes its own light: a white sheet of paper or a flashlight that is on?
- a white sheet of paper
- a flashlight that is on
Which one lets light pass through so you can see clearly through it: a brick wall or clean water in a glass?
- clean water in a glass
- a brick wall
A flashlight is moved closer to a toy. What happens to the toy’s shadow on the wall?
- It gets smaller.
- It turns into a rainbow.
- It gets bigger.
Which one lets light pass through so you can see clearly through it: clean water in a glass or a thick book?
- clean water in a glass
- a thick book
Which one lets light pass through so you can see clearly through it: clear window glass or a cardboard box?
- a cardboard box
- clear window glass
Which one makes its own light: the Moon or a flashlight that is on?
- a flashlight that is on
- the Moon
Which one makes its own light: a shiny spoon or the Sun?
- the Sun
- a shiny spoon
Answer key
- a firefly A firefly gives off its own light. The Moon only reflects light that shines on it.
- clear window glass Clear window glass is transparent: light passes through it. A wooden door is opaque: it blocks light and can make a shadow.
- clear plastic wrap Clear plastic wrap is transparent: light passes through it. A thick book is opaque: it blocks light and can make a shadow.
- clear window glass Clear window glass is transparent: light passes through it. A brick wall is opaque: it blocks light and can make a shadow.
- a flashlight that is on A flashlight that is on gives off its own light. A shiny spoon only reflects light that shines on it.
- a flashlight that is on A flashlight that is on gives off its own light. A white sheet of paper only reflects light that shines on it.
- clean water in a glass Clean water in a glass is transparent: light passes through it. A brick wall is opaque: it blocks light and can make a shadow.
- It gets bigger. A light closer to the object blocks a wider spread of light, so the shadow grows.
- clean water in a glass Clean water in a glass is transparent: light passes through it. A thick book is opaque: it blocks light and can make a shadow.
- clear window glass Clear window glass is transparent: light passes through it. A cardboard box is opaque: it blocks light and can make a shadow.
- a flashlight that is on A flashlight that is on gives off its own light. The Moon only reflects light that shines on it.
- the Sun The Sun gives off its own light. A shiny spoon only reflects light that shines on it.
PS Physical Sciences
Magnetism & induction
Magnets, magnetic fields and electromagnetism.
Short lesson: What does a magnet attract?
Study guide for Grades 1 to 4: 2 worked examples and 2 practice questions. Test the material, not the colour or size: iron and steel are attracted; wood, plastic, glass, aluminium and copper are not.
magnets attract iron and steel
Test the material, not the colour or size: iron and steel are attracted; wood, plastic, glass, aluminium and copper are not.
Worked example
Which object will a magnet pull toward it: a cotton sock or an iron nail?
Magnets attract objects that contain iron, such as steel. An iron nail contains iron; a cotton sock does not.
Answer: an iron nail
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
Which object will a magnet pull toward it: a steel bottle cap or a wooden spoon?
- a wooden spoon
- a steel bottle cap
A north pole approaches a south pole. What is expected?
- The poles disappear
- Attraction
- Repulsion only
What are the two ends of a bar magnet called?
- poles (north and south)
- corners
- handles
Which object will a magnet pull toward it: a steel paper clip or a plastic cup?
- a plastic cup
- a steel paper clip
Two north poles are brought near each other. What interaction is expected?
- Repulsion
- No magnetic interaction is possible
- Attraction only
Two magnets are held with their north poles facing each other. What happens?
- Nothing happens.
- They push each other away (repel).
- They pull together (attract).
Which object will a magnet pull toward it: an iron nail or an aluminium can?
- an aluminium can
- an iron nail
Why should two objects be tested at the same distance from a magnet?
Can a magnet pull a steel paper clip through a thin sheet of paper?
- Yes, magnetic force can act through paper.
- No, magnets only work when they touch.
Which object will a magnet pull toward it: a copper wire or an iron nail?
- an iron nail
- a copper wire
A coin is not attracted. Does that prove the magnet is broken?
Which way does a compass needle point?
- toward the ground
- always toward the Sun
- toward magnetic north
Answer key
- a steel bottle cap Magnets attract objects that contain iron, such as steel. A steel bottle cap contains iron; a wooden spoon does not.
- Attraction Unlike poles attract.
- poles (north and south) The ends of a magnet, where the pull is strongest, are its poles.
- a steel paper clip Magnets attract objects that contain iron, such as steel. A steel paper clip contains iron; a plastic cup does not.
- Repulsion Like magnetic poles repel.
- They push each other away (repel). Like poles repel; opposite poles attract.
- an iron nail Magnets attract objects that contain iron, such as steel. An iron nail contains iron; an aluminium can does not.
- Distance affects the interaction, so it should not change during the comparison. Credit a controlled variable and its purpose.
- Yes, magnetic force can act through paper. Magnetic force can act through thin, non-magnetic materials.
- an iron nail Magnets attract objects that contain iron, such as steel. An iron nail contains iron; a copper wire does not.
- No. Some metals are not strongly attracted; test a known suitable object too. Accept using a comparison object rather than assuming all metals behave alike.
- toward magnetic north A compass needle is a small magnet that lines up with Earth’s magnetism.
Review worksheet: 12 questions
Which object will a magnet pull toward it: a cotton sock or a steel bottle cap?
- a cotton sock
- a steel bottle cap
Must a magnet touch an iron object to exert a force on it?
- Only if the object is red
- Yes, always
- No
The north pole of one magnet is brought near the south pole of another. What happens?
- Nothing happens.
- They push each other away (repel).
- They pull together (attract).
Which object will a magnet pull toward it: a sheet of paper or a steel paper clip?
- a steel paper clip
- a sheet of paper
What should you do with small magnets in a classroom?
- Follow adult supervision and keep them out of mouths.
- Swallow one to test attraction.
- Leave them with toddlers.
Two magnets are held with their south poles facing each other. What happens?
- They push each other away (repel).
- Nothing happens.
- They pull together (attract).
Which object will a magnet pull toward it: an iron nail or a plastic cup?
- a plastic cup
- an iron nail
Which statement is the best testable prediction?
- Every metal is strongly attracted.
- This iron paper clip may be attracted; test it at the same gap.
- Colour alone decides attraction.
A magnet is moved farther away from a paper clip. What happens to its pull on the clip?
- It gets weaker.
- It stays exactly the same.
- It gets stronger.
Which object will a magnet pull toward it: a steel bottle cap or a plastic cup?
- a steel bottle cap
- a plastic cup
Describe evidence for magnetic repulsion without saying that objects touch.
Which object will a magnet pull toward it: a copper wire or a steel safety pin?
- a copper wire
- a steel safety pin
Answer key
- a steel bottle cap Magnets attract objects that contain iron, such as steel. A steel bottle cap contains iron; a cotton sock does not.
- No Magnetic forces can act across a gap.
- They pull together (attract). Like poles repel; opposite poles attract.
- a steel paper clip Magnets attract objects that contain iron, such as steel. A steel paper clip contains iron; a sheet of paper does not.
- Follow adult supervision and keep them out of mouths. Small magnets pose hazards and are not toys for unsupervised mouthing.
- They push each other away (repel). Like poles repel; opposite poles attract.
- an iron nail Magnets attract objects that contain iron, such as steel. An iron nail contains iron; a plastic cup does not.
- This iron paper clip may be attracted; test it at the same gap. Material and experimental conditions matter; all-metal claims are too broad.
- It gets weaker. Magnetic pull gets weaker with distance.
- a steel bottle cap Magnets attract objects that contain iron, such as steel. A steel bottle cap contains iron; a plastic cup does not.
- Two nearby like poles move apart or resist being brought closer. Credit a observable effect consistent with repulsion across a gap.
- a steel safety pin Magnets attract objects that contain iron, such as steel. A steel safety pin contains iron; a copper wire does not.
LS Life Sciences
Living things
Living and non-living things, what living things need, senses, habitats and animal groups.
Short lesson: Living things and their needs
Study guide for Grades 1 to 4: 20 key ideas, including habitat, herbivore and carnivore; 3 practice questions.
Classify using observable features, not just where an animal lives. A whale is a mammal even though it lives in water.
- Habitat. The natural place where an organism lives and obtains what it needs.
- Herbivore. An animal whose diet consists mainly of plant material.
- Carnivore. An animal whose diet consists mainly of other animals.
- Omnivore. An animal that eats both plant material and other animals.
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
Which animal is a reptile: a crocodile or a whale?
- a crocodile
- a whale
In the life cycle of a ladybug, which stage comes right after “pupa”?
- larva
- adult ladybug
- egg
Living things and their needs: which term fits this description? The transfer of pollen to the receptive part of a flower of the same species.
- Vertebrate
- Stem
- Prey
- Pollination
A pond's water level falls sharply. Which effect is plausible?
- The pond becomes a mountain.
- Every species must increase.
- Available aquatic habitat may decrease.
- No organism can be affected.
Which animal is a mammal?
- Butterfly
- Dolphin
- Trout
- Frog
In a simple food chain, which organism is a producer?
- Rabbit
- Fox
- Hawk
- Grass
Which part of a plant usually absorbs water from the soil?
- Seeds
- Fruit
- Flowers
- Roots
Which body organ pumps blood?
- Brain
- Lung
- Stomach
- Heart
Which animal is a reptile: a crocodile or a chicken?
- a crocodile
- a chicken
Which stage comes first in the life cycle of a butterfly: adult butterfly or egg?
- egg
- adult butterfly
Living things and their needs: which term fits this description? The sequence of stages an organism passes through as it grows and reproduces.
- Life cycle
- Herbivore
- Flower
- Germination
Which claim about adaptation is too simple?
- Habitats have different conditions.
- Features can affect survival.
- Populations can show variation.
- An animal grows a needed inherited trait just by wishing for it.
Answer key
- a crocodile A crocodile is a reptile: it has dry, scaly skin. A whale is a mammal.
- adult ladybug Life cycle of a ladybug: egg → larva → pupa → adult ladybug.
- Pollination Pollination: The transfer of pollen to the receptive part of a flower of the same species.
- Available aquatic habitat may decrease. Less water can reduce usable habitat.
- Dolphin
- Grass
- Roots
- Heart
- a crocodile A crocodile is a reptile: it has dry, scaly skin. A chicken is a bird.
- egg Life cycle of a butterfly: egg → caterpillar → chrysalis → adult butterfly.
- Life cycle Life cycle: The sequence of stages an organism passes through as it grows and reproduces.
- An animal grows a needed inherited trait just by wishing for it. Individual wishes do not produce inherited adaptations.
Review worksheet: 12 questions
Which animal is a bird: a frog or a parrot?
- a parrot
- a frog
Which stage comes first in the life cycle of a butterfly: caterpillar or adult butterfly?
- caterpillar
- adult butterfly
Why might a rock crevice be useful to a small animal in a hot, dry place?
Living things and their needs: which term fits this description? A plant structure that supports leaves and carries materials between parts.
- Prey
- Root
- Vertebrate
- Stem
Which animal is an amphibian: a cow or a toad?
- a toad
- a cow
Which stage comes first in the life cycle of a chicken: adult chicken or chick?
- chick
- adult chicken
Give a reason why a habitat may need connected areas rather than one small isolated patch.
Living things and their needs: which term fits this description? An animal with a backbone.
- Germination
- Carnivore
- Invertebrate
- Vertebrate
Which animal is a bird: a lizard or a duck?
- a duck
- a lizard
Which stage comes first in the life cycle of a ladybug: adult ladybug or egg?
- egg
- adult ladybug
Which resource can plants compete for?
- shoelaces
- notebook space
- light
- metal keys
Living things and their needs: which term fits this description? The reproductive structure of a flowering plant.
- Insect
- Life cycle
- Pollination
- Flower
Answer key
- a parrot A parrot is a bird: it has feathers and lays eggs. A frog is an amphibian.
- caterpillar Life cycle of a butterfly: egg → caterpillar → chrysalis → adult butterfly.
- It can offer shade, shelter and a cooler or less exposed location. Accept a plausible link to conditions, not a claim that all crevices are suitable.
- Stem Stem: A plant structure that supports leaves and carries materials between parts.
- a toad A toad is an amphibian: it has moist skin and usually starts life in water. A cow is a mammal.
- chick Life cycle of a chicken: egg → chick → adult chicken.
- Organisms may need to move for food, shelter, breeding or seasonal conditions. Accept a plausible movement need with an explanation.
- Vertebrate Vertebrate: An animal with a backbone.
- a duck A duck is a bird: it has feathers and lays eggs. A lizard is a reptile.
- egg Life cycle of a ladybug: egg → larva → pupa → adult ladybug.
- light Light can be limited when plants shade one another.
- Flower Flower: The reproductive structure of a flowering plant.
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.
Worksheets
A practice worksheet and a review worksheet, 12 and 12 questions.
Practice worksheet: 12 questions
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.
- Moon
- Uranus
- Solar eclipse
- Galaxy
Earth systems: which term fits this description? The thick rocky region between Earth's crust and core.
- Weather
- Climate
- Mantle
- Igneous rock
Why might moving a thermometer from shade into direct sun affect a comparison?
Which is a sound safety rule for a classroom Sun discussion?
- Never look directly at the Sun without appropriate certified protection and expert guidance.
- Use binoculars with no filter.
- Look longer when it is bright.
- Stare at it through ordinary sunglasses.
How could paving a previously grassy area change the route taken by rainwater?
Space and the solar system: which term fits this description? The sixth planet from the Sun, well known for its bright ring system.
- Moon
- Venus
- Sun
- Saturn
Earth systems: which term fits this description? The mostly liquid metallic layer surrounding Earth's inner core.
- Outer core
- Weathering
- Water cycle
- Runoff
What additional information is needed before attributing a change in a stream’s level to rainfall alone?
The main cause of Earth's seasons is
- Earth switching off sunlight
- Earth stopping its rotation
- the Moon changing temperature
- axial tilt during Earth's orbit
Why is the water cycle better shown as connected pathways than one single circle?
Space and the solar system: which term fits this description? The planet closest to the Sun.
- Jupiter
- Solar eclipse
- Mercury
- Light-year
Earth systems: which term fits this description? Earth's solid central metallic region.
- Inner core
- Transpiration
- Water cycle
- Precipitation
Answer key
- Solar eclipse Solar eclipse: An event in which the Moon blocks our view of part or all of the Sun.
- Mantle Mantle: The thick rocky region between Earth's crust and core.
- Exposure changed, so readings may reflect the measurement setting as well as the air conditions being compared.
- Never look directly at the Sun without appropriate certified protection and expert guidance. Unprotected solar viewing can damage eyes; use safe indirect classroom models instead.
- It may reduce infiltration and increase or redirect surface runoff, depending on drainage. Avoid claiming that all rain follows one route.
- Saturn Saturn: The sixth planet from the Sun, well known for its bright ring system.
- Outer core Outer core: The mostly liquid metallic layer surrounding Earth's inner core.
- Other relevant factors can include upstream flow, storage, evaporation, withdrawals, snowmelt and measurement timing.
- axial tilt during Earth's orbit Tilt changes sunlight angle and day length.
- Water can be stored in many places and move through different routes, including groundwater and ice. Credit multiple possible pathways or different storage times.
- Mercury Mercury: The planet closest to the Sun.
- Inner core Inner core: Earth's solid central metallic region.
Review worksheet: 12 questions
Earth systems: which term fits this description? The settling or accumulation of transported sediment.
- Runoff
- Outer core
- Deposition of sediment
- Plate tectonics
Water vapour forming liquid droplets is
- erosion
- condensation
- freezing in every case
- evaporation
Space and the solar system: which term fits this description? A relatively small rocky or metallic body orbiting the Sun.
- Galaxy
- Revolution
- Mars
- Asteroid
Earth's daily rotation mainly explains
- the cycle of day and night
- the shape of every cloud
- all Moon craters
- why all seasons are equally warm
Which two natural influences help drive water movement through the cycle?
- compass needles and maps
- sound and handwriting
- solar energy and gravity
- paint and glue
Earth systems: which term fits this description? Rock formed from deposited material or chemical precipitation that becomes consolidated.
- Sedimentary rock
- Water cycle
- Mantle
- Metamorphic rock
Liquid water becoming water vapour is
- condensation
- sedimentation
- evaporation
- melting
Space and the solar system: which term fits this description? The largest planet in our solar system.
- Revolution
- Jupiter
- Lunar eclipse
- Orbit
The Moon is visible mainly because it
- burns like a star
- reflects only city lights
- has electric lamps
- reflects sunlight
Water vapour becoming tiny liquid droplets is
- freezing only
- condensation
- evaporation
- erosion
Earth systems: which term fits this description? Long-term patterns and statistics of weather in a region.
- Climate
- Weather
- Mantle
- Lava
Rainfall on four days is 2, 0, 5 and 3 mm. Find the total rainfall in mm.
Answer key
- Deposition of sediment Deposition of sediment: The settling or accumulation of transported sediment.
- condensation
- Asteroid Asteroid: A relatively small rocky or metallic body orbiting the Sun.
- the cycle of day and night Different parts of Earth turn toward and away from sunlight.
- solar energy and gravity Solar energy supports evaporation, and gravity moves water downward.
- Sedimentary rock Sedimentary rock: Rock formed from deposited material or chemical precipitation that becomes consolidated.
- evaporation
- Jupiter Jupiter: The largest planet in our solar system.
- reflects sunlight Sunlight reflected from its surface reaches us.
- condensation Condensation changes gas to liquid.
- Climate Climate: Long-term patterns and statistics of weather in a region.
- 10 2 + 0 + 5 + 3 = 10