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Science 7 · Unit 6: Earth physics · Cambridge Lower Secondary Science Stage 7

6.3 The structure of the Earth

16 questions · e.g. Which layer is solid iron and nickel?

Practice

Questions

  1. 1. What is the thin outer layer of solid rock on the Earth called?

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  2. 2. Which thick layer of hot rock lies under the crust and can flow very slowly?

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  3. 3. Which layer of the Earth is made of molten (liquid) iron and nickel?

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  4. 4. Which layer of the Earth is made of solid iron and nickel?

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  5. 5. Which list gives the Earth's layers from the outside in?

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  6. 6. Which parts of the Earth are made of the metals iron and nickel?

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  7. 7. Scientists have worked out the age of the Earth. About how old is it?

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  8. 8. Which is the most common non-metal in the Earth's crust?

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  9. 9. Which is the most common metal in the Earth's crust?

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  10. 10. In 1912, Alfred Wegener developed the idea of continental drift. What does it mean?

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  11. 11. Wegener suggested that, millions of years ago, all the land was one large continent. What is this continent called?

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  12. 12. Which evidence led Wegener to the idea of continental drift?

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  13. 13. Why did some people not believe Wegener's idea?

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  14. 14. Which theory, developed in the 1960s, explained how continents move?

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  15. 15. According to plate tectonics, what makes the plates move?

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  16. 16. How does plate tectonics explain continental drift?

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