How do ecosystems change?

A natural change to an ecosystem occurs when____

• 1. a severe drought causes plants to die.

• trees are cut down to make paper

• 1. roads are built through a forest.

• 1. a dam is constructed to hold back water.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What kinds of changes take place during succession?

• 1. Animals move from one ecosystem to another.

• One or more species die out and no longer exist on Earth

• 1. Species slowly replace each other as the landscape changes.

• 1. Plants stop growing and making food when days get shorter and colder.

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NGSS.MS-LS2-1

NGSS.MS-LS2-3

After a forest fire, new plants and those that were not burned will ______ because the fire released nutrients into the soil.

• slowly die

• grow faster

• stop growing

• become extinct

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Some animals hibernate during the winter because they

• lay eggs that need to be kept warm.

• need to avoid predators.

• change from one form to another.

• cannot find enough food

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NGSS.MS-LS2-1

Climate change can cause changes to ecosystems. What can happen to organisms that do not change with their ecosystems?

• They can disappear from Earth

• They can stop the ecosystem from changing

• They can form new ecosystems

• They can be unaffected by the change.

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NGSS.MS-LS2-4

NGSS.MS-LS4-4

What are examples of long term effects of climate change?

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NGSS.MS-LS2-4

A volcano in Ecuador is erupting, shooting ash into the air. Burning hot gases and bits of rock flow down the side of the mountain. What is the most likely way the eruption will disturb the ecosystem around it?

• This is a slow change to the ecosystem, but the effects will last for a long me

• This is a fast change to the ecosystem and the effects will last for a long time.

• This is a slow change to the ecosystem but the effects will last a short time

• This is a fast change to the ecosystem and the effects will last a short time.

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NGSS.MS-ESS2-2

NGSS.MS-ESS3-2

NGSS.MS-LS2-4

A tree is losing its leaves during the fall. After all its leaves fall to the ground, the tree branches will be bare for the winter. Then new leaves will grow in the spring. How can scientists predict these events will happen?

• The climate is changing quickly.

• The tree is going into hibernation

• Seasonal changes occur in a cycle

• An ecosystem disturbance has happened.

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NGSS.MS-ESS1-1

NGSS.MS-LS2-3

Which one of these is a human caused change to ecosystems? (There are two answers)

• oil drilling and pollution

• volcanic eruption

• Forest fire

• Cutting down forest

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NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

Select all that are a disturbance to an ecosystem

• Wild fires

• changing seasons

• Drought

• Earthquake + Tsunami

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NGSS.MS-ESS3-2

NGSS.MS-LS2-4