Chemical Reactions and Evidence Concepts

Front

What type of change is cutting hair an example of?

Back

Physical change.

Front

What is the term for data that can be used to support a scientific claim or argument?

Back

Scientific evidence.

Front

What type of change is baking cookies an example of?

Back

Chemical change.

Front

Which of the following is NOT a sign of a chemical reaction: Change in color, Fire/burning, Dissolving in water, Change in odor, Production of gas/bubbles?

Back

Dissolving in water.

Front

What type of change are fireworks an example of?

Back

Chemical change.

Front

Define 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

Define a chemical change.

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

List three signs that a chemical reaction has occurred.

Back

1. Change in color 2. Production of gas/bubbles 3. Change in odor.

Front

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

Back

A physical change does not alter the chemical composition of a substance, while a chemical change does.

Front

What is an example of a physical change?

Back

Melting ice.