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Grade 12 · Science

Grade 12 Science diagnostic

15 questions on motion and energy, waves & sound, electricity & circuits, chemistry and biology & genetics, plus 3 from Grade 11. Answer what you can, then check your answers to see which topics are secure and what to practise next.

15 questions5 topicsAbout 15 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.

1Motion and energyA perpendicular force of 620 N acts over 10 m². Find the pressure in Pa.
Pa
2Motion and energyA 50 kg object has speed 16 m/s. Find its classical kinetic energy in J.
J
3Waves & soundA periodic wave has frequency 27 Hz and wavelength 17 m. Find its speed in m/s.
m/s
4Waves & soundA repeating signal has frequency 149 Hz. Find its period in seconds as a fraction.
s
5Electricity & circuitsThree ideal resistors of 37 Ω, 71 Ω and 64 Ω are in series. Find total resistance in Ω.
Ω
6Electricity & circuitsA constant current of 11 A flows for 115 s. How much charge passes in C?
C
7Electricity & circuitsAn ideal ohmic resistor of 53 Ω carries 4 A. Find the voltage across it in V.
V
8ChemistryDilute 60 mL of a 1.5 mol/L solution to 0.3 mol/L without losing solute. Find the final volume in mL.
mL
9ChemistryA solution contains 7 mol of solute in a final solution volume of 20 L. Find concentration in mol/L as a fraction or decimal.
mol/L
10ChemistryA sample has mass 132 g and molar mass 12 g/mol. Find its amount in mol.
mol
11Biology & geneticsGenetics and inheritance: which term fits this description? An observable characteristic produced through genes and environment.
12Biology & geneticsAn enzyme changes shape at high temperature and its rate falls. Which is a possible explanation?

From Grade 11

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

13Chemistry (Grade 11)In a simplified isotope exercise, atomic number Z = 17 and mass number A = 20. How many neutrons?
14Biology & genetics (Grade 11)For Aa × Aa, what fraction of expected offspring genotypes are AA?
15Motion and energy (Grade 11)A device transfers 180 J in 6 s. Find average power in W.
W