Skip to content
Back to quiz
6. How much iron is in the Earth's composition?
- 34.6 %
- 40 %
- 56 %
- 36 %
- 26.2 %
7. How much oxygen is there in the Earth's composition?
- 39.3%
- 29.5 %
- 22.4%
- 22 %
- 14%
8. How much silicon is there in the composition of the Earth?
- 13.4%
- 9%
- 15.2 %
- 16.8%
- 12.9%
9. How much magnesium is there in the Earth's composition?
- 34.2%
- 12.7 %
- 16.2%
- 14.5 %
- 19.8%
10. How much nitrogen is there in the atmosphere?
11. How much oxygen is there in the Earth's atmosphere?
12. What is the Earth's surface area of ocean?
- 66.6 %
- 22 %
- 16 %
- 71 %
- 54 %
13. What is the Earth's surface area of land?
14. What is the mean surface temp on Earth?
- + 14 degrees celsius
- -2 degrees celcius
- 0 degrees celsius
- + 15 degrees celsius
15. Without greenhouse gases surface temperature on Earth would be?
- - 22 degrees celsius
- +40 degrees celsius
- -21 degrees celsius
- +300 degrees celsius
16. Land surface elevation varies between how much?
- -12 km to +9 km
- -22 km to +17 km
- +6 km to + 7 km
17. What does hypsometry mean?
- The different distribution of different elevations on Earth.
- It is a measurement of height.
- The height of the highest peaks.
18. At what height are the two biomodal peaks of the Earth's hypsometry?
- -4 km and +1 km
- -6 km and +2 km
19. What elevation does continental surface range between?
- +8.8 km and -0.2 km
- -12 km and +4 km
20. What does the ocean base range between?
- -0.2 km to 11 km
- +0.8 km to -9 km