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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 1 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 264 g and volume 24 cm³. Calculate density in g/cm³.
g/cm³
2Matter & forcesA model vehicle travels 1978 m in 23 s at constant speed. What is its speed in m/s?
m/s
3Motion and energyA constant 32 N force acts in the same direction as a 30 m displacement. Find work in J.
J
4Motion and energyAn object moves at constant velocity 0 m/s for 33 s. Find displacement in m.
m
5Waves & soundA repeating signal has frequency 59 Hz. Find its period in seconds as a fraction.
s
6Waves & soundA periodic wave has frequency 53 Hz and wavelength 26 m. Find its speed in m/s.
m/s
7Electricity & circuitsThree ideal resistors of 13 Ω, 25 Ω and 24 Ω are in series. Find total resistance in Ω.
Ω
8Electricity & circuitsA steady DC device operates at 32 V and 8 A. Find power in W.
W
9ChemistryA hypothetical element has isotopes of mass 64 u (80%) and 70 u (20%). Calculate its mean atomic mass in u.
u
10ChemistryAtomic structure and chemical language: which term fits this description? A substance that produces mobile ions when dissolved or melted and can conduct electricity.
11Earth & spaceEarth systems: which term fits this description? Water falling from clouds as rain, snow or other forms.
12Earth & spaceEarth systems: which term fits this description? Water flowing over the land surface.
13Biology & geneticsCells and cell structures: which term fits this description? A group of cells working together in a particular function.
14Biology & geneticsGenetics and inheritance: which term fits this description? A three-nucleotide RNA sequence specifying an amino acid or translation signal.

From Grade 8

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

15Earth & space (Grade 8)Water soaking into soil is called
16Matter & forces (Grade 8)What is the change from liquid water to water vapour called?