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Class 8 · Science · Curiosity

11. Keeping Time with the Skies

Chapter test

Practise 5 questions from this chapter

Timed, with answers, explanations and where your marks went.

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Try question 1

Day and night happen because the Earth

Answer and explanation

Answer: B. rotates on its axis

One rotation takes about 24 hours.

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Try question 2

The Moon takes about how long to go through all its phases once?

Answer and explanation

Answer: C. 29.5 days

From one full moon to the next is about 29.5 days — the basis of lunar months.

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Try question 3

A leap year has an extra day because the Earth takes about

Answer and explanation

Answer: A. 365¼ days to go around the Sun

Four quarter-days add up to one extra day every four years.

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All 5 questions of this chapter, with explanations →