Unit 8 - Hydrosphere Review

How does overfishing impact ocean ecosystems?

• It balances marine populations.

• It helps increase fish populations.

• It disrupts food chains and reduces biodiversity.

• It increases ocean pH levels.

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Which of the following is a consequence of coral reef damage?

• increased biodiversity in the ecosystem.

• decreased food sources for humans

• cleaner and healthier oceans

• loss of habitat for numerous marine species

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Ocean warming causes coral reefs to bleach, which​ ​ (a)   the coral. As a result, it reduces marine biodiversity by​ (b)   .

• damages
• strengthens
• protects
• decreasing fish populations
• increasing sea levels
• changing the ocean acidity

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Which of the following contributes to the warming of ocean temperatures?

• decreased carbon emissions

• increased industrial activity

• increased use of electric vehicles

• decreased ocean biodiversity

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Which of the following is an economic benefit that humans gain from oceans?

• They provide less expensive fresh drinking water.

• They offer recreational activities, increasing tourism.

• They reduce global warming, reducing energy costs.

• They increase carbon dioxide levels, increasing botanical businesses profit.

Select the ways that humans rely on the ocean from the pictures below.

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How does plastic pollution effect marine life?

• It decreases the filtering of water for marine life.

• It leads to plastics being eaten and trapped by marine life.

• It provides shelter for marine life.

• It impedes the breeding grounds of marine life.

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Jasmine went on a vacation to the beach with her family. When they arrived, she noticed a lot of pollution on the shore. What kind of negative effects does this have on the ocean and its inhabitants? Select TWO answers.

• The organisms use the pollution to make their homes.

• Some organisms may get sick by eating the pollution.

• The pollution does not affect the organisms in the ocean.

• Some organisms may get tangled in the pollution and die.

• Some of the organisms use the pollution as camouflage.

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Determine how human activity can impact watersheds. Select the correct answers for each row.

Groups:

(a) Negative

,

(b) Positive

• reduce, reuse and recycle household wastes

• planting plants near water systems

• fertilizer runoff from farming and agriculture

• increasing the amount of fuel efficient cars

• Industrial waste poured from a factory drain

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Based on the image, which examples would have the LEAST effect on polluting the watershed? Select TWO answers.

• Stormwater falling into the tributaries.

• Groundwater rises onto the surface and causes the city to flood.

• The factory's smoke stream emits pollutants into the atmosphere.

• Fertilizer from the farm is removed with surface runoff.

• City residents conserve water usage.

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