Understanding Earth's Oceans and Climate

What percentage of excess heat from human activities have Earth's oceans absorbed over the past 70 years?

• 50%

• 93%

• 75%

• 85%

What causes the mild climate in Europe?

• The Gulf Stream

• The Himalayas

• The Sahara Desert

• The Amazon Rainforest

What is one major consequence of ocean heat waves?

• Increased fish populations

• Coral bleaching

• More ice formation

• Decreased salinity

How much carbon dioxide do oceans absorb from human activities?

• About 25%

• About 10%

• About 75%

• About 50%

What is a natural consequence of high carbon dioxide absorption in oceans?

• Increased oxygen levels

• Lower sea levels

• Acidification of ocean water

• Decreased temperatures

What can satellites measure related to oceans from space?

• Urban expansion

• Mountain heights

• Forest density

• Sea level and slope

What happens to ocean salinity in areas where sea ice forms?

• It fluctuates unpredictably

• It increases

• It remains the same

• It decreases

What is the thermo-haline circulation?

• A type of ocean plant

• A coastal weather pattern

• A deep ocean current system

• A method of fishing

What could happen if the North Atlantic's overturning circulation weakens?

• Stable sea levels

• Warmer air over Europe

• Fewer winter storms

• Cooler air over Europe

What are potential effects of warmer waters on the Atlantic coast of North America?

• Fewer hurricanes

• Lower sea levels

• More powerful hurricanes

• Decreased rainfall