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R2 U7 Flashcards | StudBud
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R2 U7
R2 U7
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Flashcards
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Practice quiz
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Questions
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Answers
1
What percentage of the world’s oxygen is produced by the seas and oceans?
24%
75%
14%
2
What is the highest mountain in the world?
Mount Everest
Mount Kilimanjaro
K2
3
Approximately how many dams are there in the world?
55000
5500
17000
4
The majority of the world’s volcanoes are
a. on land.
c. on the bottom of the ocean.
b. islands.
5
The Earth is approximately ____________ years old.
4.5 billion
8 billion
1.5 billion
6
At any particular time, how many volcanoes in the world are erupting?
25-30
10-20
5-10
7
What is the largest body of water in the world?
The Pacific Ocean
The Indian Ocean
The Atlantic Ocean
8
On Earth, there are _____________ continents
6
5
7
9
What percentage of the world’s freshwater is stored in glaciers?
75%
20%
55%
