The Importance of Earth's Oceans

What percentage of the Earth's surface is covered by water?

• 50%

• 60%

• 71%

• 85%

How do oceans help in regulating Earth's temperature?

• By absorbing sunlight and releasing it at night

• By storing heat in deep ocean trenches

• By reflecting sunlight back into space

• By moving warm water towards the poles and cold water towards the equator

What would happen to the Earth if the oceans disappeared?

• The Earth would become a lush forest

• The Earth would become a desert

• The Earth would become a frozen wasteland

• The Earth would remain unchanged

What is one of the consequences of losing plant life due to the absence of oceans?

• Increase in oxygen levels

• Decrease in carbon dioxide levels

• Cooling of the planet

• Massive fires releasing carbon dioxide

How long do experts estimate it would take for the oceans to completely evaporate?

• A few billion years

• A few thousand years

• Several hundred million years

• A few million years