Download Earth in the Universe 1

What do we know about the Earth in Space?
Name: ……………………………..
1. How was the Barringer crater in Arizona formed?
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2. The oldest rocks on the Earth are about 4 thousand million years old. Is the Earth older or
younger than this?
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3. On the diagram of the Earth mark
(a) the crust
(b) the mantle and
(c) the core.
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4.The Earth was formed from clouds of :
(a) ………………………
(b)
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4. Which is the larger – the biggest asteroid or the biggest comet?
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5. Which shines by its own light – comets, the Sun, asteroids, planets?
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6. Which bodies orbit the Sun in very elliptical orbits and are made of ice and rock?
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7. What powers the Sun – nuclear fission or nuclear fusion? ……………………………
8. Which element is the main ‘fuel’ for this process?
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9. Which were made in earlier stars (a) light elements (b) heavy elements?
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10. The collision of what with the Earth may have caused the extinction of the dinosaurs?
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11. What is the speed of light?
(a) infinite (b) 300 000 km/s (c) 3000 m/s
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12. (a) When we look at a distant galaxy does it appear older or younger than it really is?
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(b) Why is this?
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13. What is meant by a ‘light year’?
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14. Write down in order of increasing age – Sun, Earth, Universe.
(a)…………………… (b) ……………………… (c)
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15. Write down in order of increasing size – Milky Way, Earth, Sun.
(a)…………………… (b) ……………………… (c)
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