Physical and Chemical Changes

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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a process where one or more substances are transformed into new substances with different properties. Examples include rusting, burning, and fermentation.

Front

Is melting butter for popcorn a chemical or physical change?

Back

Physical change.

Front

What is evidence of a physical change?

Back

Shape change.

Front

What is evidence of a chemical change?

Back

Fizzing, foaming, and color change.

Front

What happens during a chemical change?

Back

During a chemical change, bonds between atoms are broken and new bonds are formed, resulting in the creation of new substances.

Front

Is rust on an iron bar a chemical change?

Back

True.

Front

What are some common indicators of a chemical change?

Back

Common indicators include color change, temperature change, gas production, and the formation of a precipitate.

Front

What is an example of a physical change?

Back

An example of a physical change is ice melting into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is burning wood.