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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 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 observationWhich is a safe substitute for direct solar viewing in this course?
2Sky observationIn the Moon’s cycle of phases, which phase comes right before the new moon?
3Sky observationWhat causes the seasons on Earth?
4Sky observationWhen it is summer in one hemisphere, the opposite hemisphere generally experiences which season?
5Solar systemWhich is a giant planet: Saturn or Mercury?
6Solar systemWhich planet is closer to the Sun: Uranus or Neptune?
7Solar systemWhich planet is closest in size to Earth?
8Solar systemWhat kind of astronomical object is the Sun?
9Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A toolbox weighs 700 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
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10Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A lander weighs 1480 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
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11Space scienceGravity on Mars is about 0.38 times as strong as on Earth. A lander weighs 810 N on Earth. About how much would it weigh on Mars? Round to one decimal place.
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12Space scienceGravity on the Moon is about one-sixth as strong as on Earth. A lander weighs 762 N on Earth. About how much would it weigh on the Moon?
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