Living Things Change Their Environments
Food, water, and air are all considered ________________.
resources
When there is no rain for a long time, a(n) ______________ can occur.
drought
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
The remains of plants or animals that live long ago are called ______________.
fossils
To ______________ means to use something again.
reuse
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
A natural disaster that happens when dry land becomes covered by water is a(n) ______________.
flood
What does a fossilized sharp tooth tell scientists about the animal it came from?
the animal was probably a meat eater
A living thing is ______________ when there are no more of its kind alive.
extinct
A person can ____________ an old tire by turning it into a tire swing.
recycle
What could happen if people introduce a new animal into an environment?
the animal uses up resources
What is the members of one kind of organism in a ecosystem?
population
What do fish fossils found on land tell us?
that part of the land was once covered in water
All living things in an ecosystem make up a ______________.
community
What are the 3 Rs?
reduce, reuse, recycle
What causes more changes to the environment than anything else?
people
The Saharan cypress is ________________ because there are few of these trees left.
endangered
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.
Harmful material that damages the air, water, or land is called ____________.
pollution
One way to help the environment is to _____________, or use less of, certain products.
reduce
The struggle among living things for survival is _______________.
competition
Droughts can lead to what type of natural disaster?
wildfires
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.
What is something that helps an organism survive?
resource
Which of the following cannot be recycled?
A. plastics
B. metals
C. glass
D. coal