Big Ideas
Big Ideas
Think Like a Scientist
Main Ideas
Science Skills
100
17. The environmental change in the picture was caused by a ________.
a. invasive species
b.landslide
c. wildfire
c. wildfire
100
What natural resource cannot be replaced in nature?
a. metals
b. trees
c. water
a. metals
200
The environmental change in the picture was caused by a _______
a. landslide
b. invasive species
c. wildfire
a. landslide
200
5. These pictures all show changes to the environment. Which of these changes was caused by humans?
Picture A
Picture B
Picture C
Picture B
200
1. ______ is an example of a slow environmental change.
A. A canyon forming
B. A volcano erupting
C. A wildfire burning
A. A canyon forming
300
The Kudzu vine comes to the United States from Asia. It grows faster than other plants and crowds out local plant species. In this example, the Kudzu vine is a(n)
a. natural resource
b.invasive species
c. natural event
b.invasive species
300
Which of the following environmental changes can be caused by humans?
A. earthquakes
B. flooding
C. invasive species
D. landslides
C. invasive species
300
InvestigationMt. St. Helens is a volcano in the state of Washington. On May 18, 1980, the volcano erupted. Scientists wanted to know how the eruption affected organisms there. Here is some of their data.
Look at the data table. Which claim about right after the volcano erupted is supported by the evidence?
A. Large trees were protected by their strong roots.
B. The river protected most of the animals that lived there.
C. Small animals were able to survive better than large animals.
C. Small animals were able to survive better than large animals.
300
You walk through the land in the photo and smell burnt trees. What claim can you make using evidence from your walk?
A. Animals can find more food in this environment.
B. Animals have moved away from this environment.
C. Natural resources have increased in this environment.
B. Animals have moved away from this environment.
400
Which of these is an example of a slow change to an environment?
A. An earthquake makes a shift in the ground.
B. A landslide shakes soil and rock loose.
C. A wildfire kills many trees in a forest.
D. A river carries away rock to form a canyon.
D. A river carries away rock to form a canyon.
400
3. _______ is an example of a very fast environmental change.
A. An earthquake
B. An invasive species
C. Resource removal
A. An earthquake
400
12. Which of the following is an example of a natural resource?
A.trees
B.water
C. all of the above
C. all of the above
400
7. Bluebirds, like the one in the photo, need these things: • grassy fields to find food. • an old tree or rotting wooden fence near the field with a hole to nest in. As more homes are built, more trees are cut down. Wooden fences are replaced with metal fences. The environment changes. The number of bluebirds has gone down. Which is a fast change to increase the numbers of bluebirds?
A. Allow forests to grow back.
B. Plant trees and wait for them to grow old and rot.
C. Put up birdhouses with holes near grassy fields.
C. Put up birdhouses with holes near grassy fields.
500
True or false? Scientists and engineers work together to build dams which prevent floods.
True
False
TRUE
500
A group of living things of the same kind is called a(n)
a. species.
b.predator
c. population
a. species
500
Compare the information in the left and right sides of the table. Which claim best explains those differences?
A. As an environment changes, different species survive well there.
B. When the environment changed, invasive species were able to move in.
C. Because natural resources were destroyed, few species can now live there.
A. As an environment changes, different species survive well there.
500
Ice once covered all the land in the picture. Which claim most likely explains the way the environment looks now?
A. The eruption of a volcano caused the change.
B. The change was caused by a fast increase in rainfall.
C. The change was caused by a slow change in temperature.
The change was caused by a slow change in temperature.
500
The Colorado River is one of the longest rivers in the United States. It created the Grand Canyon by wearing away at the rock surrounding it. It is home to many species of fish and reptiles. People have built dams on the Colorado River to prevent floods and to get electricity.
How would a drought most likely affect the species that live in the Colorado River?
Possible answer: A drought could cause the water to dry up in the river, and the fish in the river could die