U5 L3 How Do Environmental Changes Affect Organisms?

Environmental changes happen all the time. Some of these changes are easy to spot. For example, the figure below shows a sign that you might see while riding along a road in many places.

What can you conclude about environmental changes after seeing this sign?

• Changes in the environment happen in cycles.

• The only changes to the environment happen naturally.

• Humans can change the environment by destroying habitat.

• Any change made to the environment will lead to species extinction.

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   Hurricanes that strike land are considered natural disasters. Why are hurricanes also considered seasonal disasters?

• Hurricanes can cause major damage.

• Hurricanes occur in areas all over the country.

• Hurricanes develop only during certain times of the year.

• Hurricanes strike only coastal regions and not areas that are far inland.

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An invasive species can change an ecosystem by affecting its native species.

Which of these four graphs correctly shows what can happen to a native species when an invasive species successfully adapts to its new environment?

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In which of these ways would doubling a region’s human population most likely change the environment?

• People will destroy more habitat by building homes and buildings.

• People will protect more organisms than they did before the increase.

• People will set aside more land for conserving endangered organisms.

• People will use fewer resources that other organisms also need for survival.

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What is succession?

• The first species to populate an area.

• Is the same of interaction

• Is Disruption to the physical or biological components.

• The gradual changes of organisms in an ecosystem .

The  Plant life that starts to grow after the volcano is..

• primary succession

• secondary succession

• tertiary succession

• variable succession

What is the order of succession shown in this figure?

• A, B, C, D

• B, A, D, C

• C, D, A, B

• D, A, B, C

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What is the first species you will see in primary succession?

• lichens

• grasses

• small plants

• large plants

Which of these activities is most likely to have a negative impact on Earth's environment?

• Planting Trees

• Recycling paper and plastic

• Constructing highways

• None of the above

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Alligators are the large predators that eat many of the smaller animals in a swamp. How might removing the alligators from a swamp habitat create a decrease in vegetation?

• meat-eating animals would be eating plants

• plants in the swamp would get more sunlight

• plants would not be able to spread their seeds

• more plant-eating animals would survive

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