Living Things Change Their Environments
Changes Affect Living Things
Living Things of the Past
Vocabulary
The 3 Rs
100

Food, water, and air are all considered ________________.

resources

100

When there is no rain for a long time, a(n) ______________ can occur.

drought

100

 Which of the following is a reason why pandas are endangered?

    A.    people have destroyed the forests where they live

    B.     water sources in their environment have dried up

    C.     they are no longer able to migrate in the winter

    D.     hunters kill them for their fur

  A.    people have destroyed the forests where they live

100

The remains of plants or animals that live long ago are called ______________.

fossils

100

To ______________ means to use something again.

reuse

200

An example of something that is harmful to the environment is ____________.

A.      a bird that builds a nest on a rooftop.

B.      a lake filled with fresh water

C.      an oil spill in the ocean

D.      a plant that decomposes 

C. an oil spill in the ocean

200

A natural disaster that happens when dry land becomes covered by water is a(n) ______________.

flood

200

What does a fossilized sharp tooth tell scientists about the animal it came from?

the animal was probably a meat eater

200

A living thing is ______________ when there are no more of its kind alive.

extinct

200

A person can ____________ an old tire by turning it into a tire swing.

recycle

300

What could happen if people introduce a new animal into an environment?

the animal uses up resources

300

What is the members of one kind of organism in a ecosystem?

population

300

 What do fish fossils found on land tell us?

that part of the land was once covered in water

300

All living things in an ecosystem make up a ______________.

community

300

What are the 3 Rs?

reduce, reuse, recycle

400

What causes more changes to the environment than anything else?

people

400

The Saharan cypress is ________________ because there are few of these trees left.

endangered

400

Which of the following statements is false?

A.      People often cause permanent changes to the environment.

B.    All plants and animals have survived in their ecosystems.

C.     Scientists study fossils to learn about the past.

D.     Not all changes are bad for the environment.

B.    All plants and animals have survived in their ecosystems.

400

Harmful material that damages the air, water, or land is called ____________.

pollution

400

One way to help the environment is to _____________, or use less of, certain products.

reduce

500

The struggle among living things for survival is _______________.

competition

500

Droughts can lead to what type of natural disaster?

wildfires

500

Which of the following is not a reason that an organism can become endangered?

A.      People have destroyed its environment. 

B.     The organism’s climate has changed.

C.     The organism migrates in the winter.

D.     Hunters have killed too many of the organism.

C.     The organism migrates in the winter.

500

What is something that helps an organism survive?

resource

500

Which of the following cannot be recycled?

A.      plastics

B.     metals

C.    glass

D.     coal

D. coal