Sewer drains along city streets connect to underground systems, which direct rain water and other substances to the oceans. Which of the following human activities can most negatively affect the oceans via sewer drains?

spraying lawns with chemicals to kill weeds and insects

collecting and storing rainwater before it reaches drains

sweeping dead leaves into the gutters along streets

pouring salt on streets and sidewalks when it snows

Humans depend on thriving populations of fish for sources of food. Which of the following human activities has the greatest negative impact on the ability to harvest food sources from the ocean?

allowing factories to dump their waste products into rivers and streams

protecting areas where certain species of fish are known to breed

setting a limit on the number of fish that can be caught in an area

raising threatened species in fish farms and then releasing them into the ocean

The commercial fishing industry uses large nets to capture fish. Often these nets catch many species of organisms that are not used by humans. What change could lessen the negative effect of this practice of the commercial fishing industry?

designing nets that release unwanted species without harming them

exploring new and uncharted areas of the ocean where the nets can be used

using the nets in deeper regions of the ocean where different organisms live

decreasing the size of the nets, but using more of them

Which of the following human activities will have the greatest negative impact on the balance of organisms within an ocean ecosystem?

commercial fishing to provide food for humans

recreational boating in rivers, lakes, and streams

mapping of the ocean floor by marine scientists

monitoring of major, global ocean currents

Humans use large ships to transport materials across the ocean. Which of the effects listed is the greatest harmful effect of this human activity on the ocean ecosystem?

Organisms attach themselves to ships and become accidentally introduced into a new area

Marine animals, such as dolphins, follow ships and become disoriented, straying too far from home to return

Propellers from large ships disturb colonies of photosynthetic plants near the ocean's surface

Noises from the ship's navigation systems interfere with the ability of organisms to communicate with one another

8.11C

Authored by Kristina Rodriguez

Biology

8th Grade

NGSS covered

Used 73+ times

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15 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are all the factors that affect the amount of runoff?

area receives, type of soil, shape of land, vegetation

air, water, ice, dirt

type of percipitation , shape of land, vegetation

What do we call the land area that supplies water to a river system?

runoff

recharge

watershed

valley

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What do we call water that flows over the ground surface rather than soaking in?

runoff

discharge

recharge

tributary

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Approximately 75 percent of the Earth's surface is covered in water. So why is water considered such a precious resource?

The greenhouse effect is causing most of the world's freshwater to be trapped in the atmosphere

Only a small fraction of the Earth's water is freshwater available for drinking and irrigation

Each year, more freshwater is being trapped in icecaps located at the North and South Poles

Global warming caused by greenhouse gas emissions will likely cause Earth's oceans to evaporate

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Humans often change ecosystems as a result of population growth, consumption, and technology. Which of the following exemplifies a way in which humans modify ecosystems?

factory and automotive emissions causing acid rain

redirecting and storing freshwater behind dams

cutting down trees to build new buildings and roads

all of these

Who causes the most damage to coral reefs?

Whales

Fish

Boats

Humans

How can we protect the coral reef even if we don't live near it?

Don't do anything

Go diving and take fish out

Don't throw anything in the ocean

Clean the reefs with soap

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8.11C

What are all the factors that affect the amount of runoff?

What do we call the land area that supplies water to a river system?

What do we call water that flows over the ground surface rather than soaking in?

Approximately 75 percent of the Earth's surface is covered in water. So why is water considered such a precious resource?

Humans often change ecosystems as a result of population growth, consumption, and technology. Which of the following exemplifies a way in which humans modify ecosystems?

Who causes the most damage to coral reefs?

How can we protect the coral reef even if we don't live near it?

a man made, underwater structure that promotes the growth of reef dwelling aquatic organisms.

taking more fish out of an ecosystem than can be replaced by the reproductive rates of the remaining populations.

Any process (like wind or rain) that breaks down rock & soil down into smaller piece (without changing its chemical composition).

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