5th Grade Science State Test Review

Front

What is rusting?

Back

Rusting is a chemical change that occurs when iron reacts with oxygen and moisture, forming iron oxide (rust).

Front

What does gravity do?

Back

Gravity is a force that pulls objects toward the center of the Earth.

Front

What is the largest ocean on Earth?

Back

The Pacific Ocean is the largest source of salt water on Earth.

Front

What percentage of Earth's water is freshwater?

Back

Only 2.5% of Earth's global water is freshwater.

Front

Where is most of Earth's freshwater found?

Back

Most of Earth's freshwater is found in glaciers.

Front

What covers most of Earth's surface?

Back

Most of Earth's surface is covered with water.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances.

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 main source of Earth's salt water?

Back

The main source of Earth's salt water is the oceans.

Front

What is the role of plants in an ecosystem?

Back

Plants produce oxygen and serve as a food source for other organisms in an ecosystem.