Understanding Our Oceans

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

• About 50%

• About 60%

• About 70%

• About 80%

What is the primary reason for the ocean's large habitat?

• Its depth

• Its saltiness

• Its coverage of the Earth's surface

• Its temperature

How does the ocean help regulate the global climate?

• By producing oxygen

• By absorbing and distributing solar heat

• By absorbing sunlight

• By hosting marine life

Which of the following is NOT a major ocean region?

• Sahara

• Atlantic

• Indian

• Pacific

Why does the ocean taste salty?

• Because of pollution

• Because of algae

• Because of sodium and chloride ions

• Because of the fish

What is one major way climate change is affecting the ocean?

• Making it less salty

• Causing it to freeze

• Increasing its size

• Warming the water

What is the consequence of higher sea surface temperatures?

• More fish

• Clearer water

• Stronger and more frequent storms

• More frequent snow

What is the average rate of ocean surface temperature rise over the past century?

• 0.3 degrees Fahrenheit per decade

• 0.03 degrees Fahrenheit per decade

• 1.3 degrees Fahrenheit per decade

• 0.13 degrees Fahrenheit per decade

Since 1993, how has the rate of sea level rise changed?

• Decreased

• No change

• Stayed the same

• Doubled

What effect does rising sea levels have on coastal regions?

• Decreased humidity

• Flooding on once dry land

• Increased tourism

• More fishing areas