Science Review

A metal ball has an electrical charge. What will happen when it is brought near another metal ball with the same electrical charge?

•  The two balls will be pulled toward each other. 
• The two balls will be pushed away from each other. 
• The two balls will touch and move in circles around each other. 
• The two balls will touch and then remain connected with each other. 

A geologist wants to test the streak of a mineral. What should the geologist do? 

• rub the mineral along a ceramic plate 
• view the mineral under bright lights 
• place salt on top of the mineral 
• use fire to melt the mineral

This is a waxing moon.   What causes the moon to appear this way? 

• Light from the sun is being reflected on part of the moon. 
• The moon is moving away from the shadow of Earth. 
• Light produced by the moon is being reflected by Earth. 
• The moon is moving into the shadow of Earth. 

Which can a scientist learn from studying a plant fossil? 

• how long ago the plant lived 
• how the plant became extinct 
• how many plants lived in the area 
• how many animals lived near the plant  

Which is an example of a slow change to Earth’s surface? 

• A well collects rainwater.  
• A boat travels toward the shore.
• A tree branch falls to the ground.
• A river carries sediment to the ocean. 

Bluebirds live in open meadows and trees. The trees and plants near a meadow were removed to build a shopping center. How could this affect the bluebird population? 

• A It could give the bluebird population more space to live.
•  It could force the bluebird population to find a new place to live. 
•  It could cause all of the bluebird population in the area to die. 
• D It could provide a larger selection of food for the bluebird population. 

The water level in a lake is decreasing. How could this affect the plants and animals living in the lake?

• It might provide more space for the plants and animals. 
• It might reduce the amount of space for the plants and animals. 
• It might help the animals living in the lake, but it may harm the plants. 
• It might help the plants living in the lake, but it may harm the animals. 

Which will most likely occur during winter in the United States? 

• Snakes will build nests in other places. 
• Birds will migrate to the north. 
• Frogs will search for a mate. 
• Bats will hibernate in caves. 

A grasshopper eats a blade of grass. What is grass? 

• It is food because it is green. . 
• It is food because it provides energy
• It is food because it produces oxygen gas. 
• It is food because it is found in the ground

What is the source of energy animals need to survive? 

• minerals 
• water 
•  food 
•  air