8th Science STAAR Review

Front

What causes Earth's seasons?

Back

The tilt of Earth's axis.

Front

What evidence indicates a chemical reaction occurs as a cake bakes?

Back

The cake rises as gas bubbles form in the baking cake.

Front

Where are the instructions for a tiger's fur pattern stored?

Back

On genes within chromosomes.

Front

What describes an object moving at a constant speed?

Back

Moving at a constant speed.

Front

What diagram shows a toy car that will most likely accelerate to the right?

Back

(Diagram showing net force to the right).

Front

What is the process by which plants make their own food?

Back

Photosynthesis.

Front

What is the basic unit of life?

Back

The cell.

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is an ecosystem?

Back

A community of living organisms and their environment.

Front

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

Back

A physical change alters the form of a substance, while a chemical change alters its composition.