Introduction - 1

Question 1

How much of the ocean bottom has been mapped?

Answer 1

Less than 2%

Question 2

What is oceanic crust made from?

Answer 2

Basalt

Question 3

What is continental crust made from?

Answer 3

Granite

Question 4

What is the density of oceanic crust?

Answer 4

2.9 gcm-3

Question 5

What is the density of continental crust?

Answer 5

2.7 gcm-3

Question 6

What % of the earth’s surface is covered with oceans?

Answer 6

71%

Question 7

What % of the earths surface does the Pacific cover?

Answer 7

31%

Question 8

What % of the earths surface does the Atlantic cover?

Answer 8

16%

Question 9

What % of the earths surface does the Indian Ocean cover?

Answer 9

14%

Question 10

What % of the earths surface does the Arctic ocean cover?

Answer 10

3%