Chapter 4 Lessons 3 Review

What causes ecosystems to change?

• animals

• living things

• people

• natural events

Which is not a natural event that can change an ecosystem?

• floods

• thunderstorms

• droughts

• forest fires

How can living things change an ecosystem?

• Large populations reducing food supply

• Cut down trees which destroys a forest habitat

• Gator holes during a drought

• Volcanic eruptions destroying ecosystems

How do people change ecosystems?

• deforestation

• population

• pollution

• protection

What are the 3 main ways that an organism reacts to a dramatic change in an ecosystem?

• Accommodation

• Moving Away

• Becoming Endangered

• Becoming Extinct

What is accommodation?

• when an ecosystem responds to change

• when animals move away

• an individual's response to change

• when animals begin to become endangered or extinct

What does endangered mean?

• a living thing that has few of its kind left

• a living thing with none of its kind left

What is an example of an animal adapting to change in an ecosystem?

• Birds migrating south

• Rabbits escaping a forest fire

• Deer eating bark instead of leaves

• Gator in a wetland during a drought

When a species no longer exists, it is _________.

• accommodating

• moving away

• endangered

• extinct

Why do living things become extinct?

• They don't adapt to change

• Their food supply is running out

• They don't reproduce

• They are hunted