Aquatic Ecosystems Study Guide

What does the evaporation of water from the oceans provide?

• Most of the planet's rainfall

• Increased ocean salinity

• Decreased atmospheric pressure

• Higher ocean temperatures

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How do ocean temperatures affect the world?

• They have no effect

• They influence world climate and wind patterns

• They only affect marine life

• They cause earthquakes

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What role do marine algae and photosynthetic bacteria play in the environment?

• They produce a small amount of oxygen

• They consume a large amount of nitrogen

• They provide a substantial portion of the world's oxygen and consume a large amount of carbon dioxide

• They only affect marine ecosystems

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What are the primary factors that determine aquatic ecosystems?

• Depth, flow, temperature, and chemistry of the water

• Type of fish, amount of sunlight, and water color

• Water salinity, fish species, and plant types

• Temperature, humidity, and soil type

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NGSS.MS-LS2-1

Which of the following is an abiotic factor that affects aquatic ecosystems?

• The type of fish present

• The depth of the water

• The number of predators

• The variety of plants

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NGSS.MS-LS2-4

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

• 50%

• 60%

• 70%

• 80%

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NGSS.MS-ESS2-4

How far does sunlight penetrate into the ocean as mentioned in the text?

• A few hundred meters

• A few kilometers

• A few dozen meters

• A few thousand meters

What is the photic zone in the ocean?

• The part of the ocean that receives sunlight

• The cold and dark depths of the ocean

• The ocean floor

• The area where no photosynthesis occurs

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NGSS.MS-LS1-6

How is the ocean vertically divided based on available light?

• Into the photic zone and the aphotic zone

• Into the warm zone and the cold zone

• Into the shallow zone and the deep zone

• Into the light zone and the dark zone

What is a characteristic of the aphotic zone?

• It receives sunlight

• Photosynthesis occurs here

• It is permanently dark

• It is a thin surface layer

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