StudyBrixFree worksheets, study guides and courses

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 2 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 105 g and volume 5 cm³. Calculate density in g/cm³.
g/cm³
2Matter & forcesA model vehicle travels 351 m in 9 s at constant speed. What is its speed in m/s?
m/s
3Motion and energyA mass of 30 kg has velocity -5 m/s. Find its signed momentum in kg·m/s.
kg·m/s
4Motion and energyA 5 kg sample has specific heat 400 J/(kg·°C). Its temperature rises 18°C with no phase change. Find the energy gained in J.
J
5Waves & soundA periodic wave has frequency 70 Hz and wavelength 13 m. Find its speed in m/s.
m/s
6Waves & soundA repeating signal has frequency 196 Hz. Find its period in seconds as a fraction.
s
7Electricity & circuitsThree ideal resistors of 62 Ω, 56 Ω and 11 Ω are in series. Find total resistance in Ω.
Ω
8Electricity & circuitsA constant current of 9 A flows for 113 s. How much charge passes in C?
C
9ChemistryA hypothetical element has isotopes of mass 40 u (15%) and 43 u (85%). Calculate its mean atomic mass in u.
u
10ChemistryHow many hydrogen atoms are represented by 3H₂O?
11Earth & spaceEarth systems: which term fits this description? Rock formed from deposited material or chemical precipitation that becomes consolidated.
12Earth & spaceEarth systems: which term fits this description? Rock formed as magma or lava cools and solidifies.
13Biology & geneticsEcosystems and interactions: which term fits this description? A community of organisms together with its non-living environment.
14Biology & geneticsFor AA × aa, what fraction of modeled offspring is Aa?

From Grade 8

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

15Chemistry (Grade 8)What is the solvent in an ordinary salt-water solution?
16Biology & genetics (Grade 8)In grass → rabbit → fox, what does the first arrow represent?