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Grade 8 · Astronomy & space

Grade 8 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 4 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 before the new moon?
2Sky observationAbout how long does the Moon take to go through all of its phases?
3Sky observationA diagram divides one full rotation into 24 equal parts. How many degrees are in each part?
degrees
4Sky observationIn the Moon’s cycle of phases, which phase comes right after the third quarter?
5Solar systemWhich planet is closer to the Sun: Mars or Mercury?
6Solar systemWhich is a giant planet: Mercury or Jupiter?
7Solar systemWhich planet is famous for its bright, wide rings?
8Solar systemTwo model orbit radii are 3 AU and 9 AU. Find the larger-to-smaller radius ratio.
9Space 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
10Space scienceA lander has a mass of 103 kg on Earth. What is its mass on the Moon?
kg
11Space scienceA science instrument has a mass of 125 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 1110 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
N