Chapter 20.1A Review

What are the properties of pure liquid water?

• Tasteless, odorless, and colorless

• Salty, colored, and odorous

• Sweet, fragrant, and colored

• Bitter, odorless, and colored

Is ocean water pure?

• Yes, it is pure

• No, it is not pure

• It is sometimes pure

• It is always pure

What does ocean water contain?

• Only pure water

• Dissolved gases and solids

• Only dissolved gases

• Only dissolved solids

Which gases are also the main gases in the ocean?

• Nitrogen and oxygen

• Carbon dioxide and methane

• Helium and hydrogen

• Argon and neon

How do dissolved gases primarily get into the ocean?

• Through volcanic eruptions

• From the atmosphere

• Via underwater vents

• Through human activity

Which of the following is a way dissolved gases enter the ocean?

• Photosynthesis

• Streams and rivers

• Evaporation

• Condensation

How does temperature affect the amount of dissolved gases in the ocean?

• It has no effect.

• It increases the amount of dissolved gases.

• It decreases the amount of dissolved gases.

• It affects the amount of dissolved gases.

What happens when water temperature rises?

• The ocean absorbs more CO₂

• The ocean releases CO₂ back into the atmosphere

• The ocean freezes

• The ocean becomes more acidic

Why are oceans referred to as a carbon sink?

• They release carbon into the atmosphere.

• They contain 60+ times more carbon than the atmosphere.

• They produce carbon naturally.

• They have no effect on carbon levels.

What percentage of ocean water is pure water?

• 96.5%

• 3.5%

• 50%

• 100%