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.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances, often accompanied by energy changes such as heat or light.

Front

Is cracking an egg and mixing it up a chemical change?

Back

No, it is a physical change because the egg's components remain the same.

Front

What happens when a yellow dye capsule is added to clear liquid?

Back

The capsule dissolves and the liquid changes to a yellow color.

Front

What is an example of a chemical change observed in a burning candle?

Back

The candle wick burns with a flickering flame.

Front

What defines a chemical change in terms of substance creation?

Back

A chemical change creates a new substance and may release light or heat.

Front

What is produced when zinc reacts with hydrochloric acid?

Back

A gas is produced.

Front

What happens to the size of a candle during burning?

Back

The size of the candle reduces as the wax melts and burns.

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rust forming on iron is an example of a chemical change.