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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 3 of 5

Skip a question if you do not know the answer. It is better than guessing, because it shows what to practise.

1Sky observationIn the Moon’s cycle of phases, which phase comes right after the waxing gibbous?
2Sky observationWhy do we see Moon phases?
3Sky observationWhy does Polaris (the North Star) seem to stay almost still in the night sky?
4Sky observationIn the Moon’s cycle of phases, which phase comes right before the waxing crescent?
5Solar systemWhich is a giant planet: Saturn or Mars?
6Solar systemWhich planet is closest in size to Earth?
7Solar systemWhich planet is farther from the Sun: Neptune or Saturn?
8Solar systemTwo model orbit radii are 3 AU and 9 AU. Find the larger-to-smaller radius ratio.
9Space scienceGravity on the Moon is about one-sixth as strong as on Earth. A rover weighs 858 N on Earth. About how much would it weigh on the Moon?
N
10Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A lander weighs 910 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
N
11Space scienceA rover has a mass of 142 kg on Earth. What is its mass on the Moon?
kg
12Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A rover weighs 350 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
N