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Grade 7 · Astronomy & space

Grade 7 Astronomy & space diagnostic

12 questions on solar system, space science and sky observation. Answer what you can, then check your answers to see which topics are secure and what to practise next.

12 questions3 topicsAbout 15 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.

1Sky observationWhy can’t we see stars in the daytime sky?
2Sky observationWhat is the main cause of Earth's seasons?
3Sky observationIn the Moon’s cycle of phases, which phase comes right before the waxing gibbous?
4Sky observationAbout how long does Earth take to travel once around the Sun?
5Solar systemWhich planet is closer to the Sun: Venus or Earth?
6Solar systemWhich is a rocky (terrestrial) planet: Neptune or Mars?
7Solar systemWhich planet is closest in size to Earth?
8Solar systemWhich force primarily binds planetary orbits on solar-system scales?
9Space scienceA toolbox has a mass of 16 kg on Earth. What is its mass on the Moon?
kg
10Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A lander weighs 610 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
N
11Space scienceGravity on the Moon is about one-sixth as strong as on Earth. A lander weighs 138 N on Earth. About how much would it weigh on the Moon?
N
12Space scienceGravity on the Moon is about one-sixth as strong as on Earth. A rover weighs 852 N on Earth. About how much would it weigh on the Moon?
N