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Grade 9 · Science

Grade 9 Science diagnostic

16 questions on matter & forces, motion and energy, waves & sound, electricity & circuits, chemistry, earth & space and biology & genetics, plus 2 from Grade 8. Answer what you can, then check your answers to see which topics are secure and what to practise next.

16 questions7 topicsAbout 20 minutesSet 5 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Matter & forcesA sample has mass 504 g and volume 21 cm³. Calculate density in g/cm³.
g/cm³
2Matter & forcesA model vehicle travels 1232 m in 28 s at constant speed. What is its speed in m/s?
m/s
3Motion and energyA perpendicular force of 702 N acts over 26 m². Find the pressure in Pa.
Pa
4Motion and energyA constant 18 N force acts in the same direction as a 40 m displacement. Find work in J.
J
5Waves & soundA periodic wave has frequency 70 Hz and wavelength 26 m. Find its speed in m/s.
m/s
6Waves & soundA repeating signal has frequency 180 Hz. Find its period in seconds as a fraction.
s
7Electricity & circuitsA constant current of 12 A flows for 57 s. How much charge passes in C?
C
8Electricity & circuitsA steady DC device operates at 49 V and 1 A. Find power in W.
W
9ChemistryIn a simplified isotope exercise, atomic number Z = 2 and mass number A = 21. How many neutrons?
10ChemistryA hypothetical element has isotopes of mass 64 u (90%) and 66 u (10%). Calculate its mean atomic mass in u.
u
11Earth & spaceEarth systems: which term fits this description? Rock formed as magma or lava cools and solidifies.
12Earth & spaceEarth systems: which term fits this description? The breakdown of rock in place at or near Earth's surface.
13Biology & geneticsCells and cell structures: which term fits this description? The net movement of water across a selectively permeable membrane toward lower water potential.
14Biology & geneticsFor Aa × Aa, which genotype class has the largest expected fraction?

From Grade 8

These questions check skills from the grade below, so gaps can be spotted early.

15Biology & genetics (Grade 8)Which organism commonly acts as a decomposer?
16Chemistry (Grade 8)What is the solvent in an ordinary salt-water solution?