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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 4 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 364 g and volume 52 cm³. Calculate density in g/cm³.
g/cm³
2Matter & forcesA model vehicle travels 2592 m in 48 s at constant speed. What is its speed in m/s?
m/s
3Motion and energyAn object moves at constant velocity -20 m/s for 23 s. Find displacement in m.
m
4Motion and energyA device transfers 1428 J in 21 s. Find average power in W.
W
5Waves & soundA repeating signal has frequency 14 Hz. Find its period in seconds as a fraction.
s
6Waves & soundA periodic wave has frequency 8 Hz and wavelength 10 m. Find its speed in m/s.
m/s
7Electricity & circuitsAn ideal ohmic resistor of 44 Ω carries 11 A. Find the voltage across it in V.
V
8Electricity & circuitsThree ideal resistors of 62 Ω, 57 Ω and 87 Ω are in series. Find total resistance in Ω.
Ω
9ChemistryIn a simplified isotope exercise, atomic number Z = 16 and mass number A = 41. How many neutrons?
10ChemistryA hypothetical element has isotopes of mass 80 u (15%) and 83 u (85%). Calculate its mean atomic mass in u.
u
11Earth & spaceEarth systems: which term fits this description? Loss of water vapour from a plant, mainly through its leaves.
12Earth & spaceEarth systems: which term fits this description? Water flowing over the land surface.
13Biology & geneticsGenetics and inheritance: which term fits this description? A three-nucleotide RNA sequence specifying an amino acid or translation signal.
14Biology & geneticsCells and cell structures: which term fits this description? A group of cells working together in a particular function.

From Grade 8

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

15Biology & genetics (Grade 8)In grass → rabbit → fox, what does the first arrow represent?
16Earth & space (Grade 8)Space and the solar system: which term fits this description? Spinning around an object's own axis.