5th Grade Science Review

Front

What caused the formation of craters on celestial bodies?

Back

Craters are primarily formed by the impact of meteors.

Front

What percentage of the world's water is salty ocean water?

Back

97% of the world's water is salty ocean water.

Front

What is an example of a chemical change?

Back

Exploding fireworks is an example of a chemical change.

Front

True or False: The hydrosphere covers about 70 percent of Earth's surface.

Back

True.

Front

What happens to animals in a lake if the water becomes polluted?

Back

Animals in the lake will die.

Front

What is the hydrosphere?

Back

The hydrosphere includes all the water on Earth's surface, such as lakes, rivers, and oceans.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not.

Front

What is the water cycle?

Back

The water cycle is the continuous movement of water on, above, and below the surface of the Earth.

Front

What is pollution?

Back

Pollution is the introduction of harmful substances or products into the environment.