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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 3 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 171 g and volume 9 cm³. Calculate density in g/cm³.
g/cm³
2Matter & forcesA model vehicle travels 3818 m in 46 s at constant speed. What is its speed in m/s?
m/s
3Motion and energyA perpendicular force of 810 N acts over 15 m². Find the pressure in Pa.
Pa
4Motion and energyAn object moves at constant velocity -8 m/s for 39 s. Find displacement in m.
m
5Waves & soundA periodic wave has frequency 73 Hz and wavelength 26 m. Find its speed in m/s.
m/s
6Waves & soundA repeating signal has frequency 195 Hz. Find its period in seconds as a fraction.
s
7Electricity & circuitsAn ideal ohmic resistor of 20 Ω carries 12 A. Find the voltage across it in V.
V
8Electricity & circuitsA steady DC device operates at 47 V and 5 A. Find power in W.
W
9ChemistryA hypothetical element has isotopes of mass 60 u (80%) and 62 u (20%). Calculate its mean atomic mass in u.
u
10ChemistryIn a simplified isotope exercise, atomic number Z = 14 and mass number A = 51. How many neutrons?
11Earth & spaceEarth systems: which term fits this description? The thick rocky region between Earth's crust and core.
12Earth & spaceEarth systems: which term fits this description? The ongoing movement of water among Earth's reservoirs.
13Biology & geneticsWhich genotype is homozygous recessive?
14Biology & geneticsCells and cell structures: which term fits this description? The molecule that stores hereditary information in cells.

From Grade 8

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

15Matter & forces (Grade 8)What is the change from liquid water to water vapour called?
16Chemistry (Grade 8)Which mixture could a magnet help separate?