What is the primary material that coral reefs are made of?

• Sodium chloride

• Silicon dioxide

• Magnesium sulfate

• Calcium carbonate

Why are coral reefs important to coastal ecosystems?

• They produce oxygen for marine life.

• They increase the temperature of the water.

• They prevent coastal erosion.

• They provide a source of fresh water.

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NGSS.MS-LS2-3

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What is coral bleaching?

• A method used to clean coral reefs.

• A natural process of coral growth.

• A phenomenon where coral reefs turn white and die.

• A process where coral reefs turn green due to algae.

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What is a major consequence of coral reef bleaching?

• Enhanced coral growth

• Improved water quality

• Loss of habitat for marine life

• Increased fish population

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What is a common visual effect of oil spills on birds?

• They become more colorful.

• They are covered in oil and cannot fly.

• They start to glow in the dark.

• They grow larger feathers.

How do oil spills affect the aquatic ecosystem?

• They have no significant impact.

• They promote the growth of coral reefs.

• They disrupt the natural balance and harm marine life.

• They increase the oxygen levels in water.

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NGSS.MS-LS2-4

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What causes oceanic dead zones?

• Excessive fishing

• Runoff of fertilizers and sewage

• Natural ocean currents

• Increased water temperature

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NGSS.MS-LS2-1

What is a hypoxic zone?

• A place with abundant marine life

• A region with high salinity

• An area with high oxygen levels

• A zone with low oxygen levels

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NGSS.MS-LS1-5

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What is one effect of mercury pollution in aquatic environments?

• It reduces the water temperature.

• It promotes the growth of algae.

• It increases the water's pH level.

• It makes the water highly toxic.

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How can waste from Chicago affect aquatic environments far away?

• It can increase the water's temperature.

• It can travel through rivers and cause pollution downstream.

• It can create new habitats for marine life.

• It can change the water's color.

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NGSS.MS-ESS3-4

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