Physical and chemical Changes

Front

What is a sign that a chemical reaction has occurred?

Back

Formation of a gas.

Front

What begins and ends with the same type of matter?

Back

Physical change.

Front

What is water turning into ice an example of?

Back

Physical Change.

Front

What kind of properties can only be observed when a substance changes into a different substance?

Back

Chemical properties.

Front

Do all types of matter exist in 3 states: solid, liquid, gas?

Back

False.

Front

What is a physical change?

Back

A change that does not alter the chemical composition of a substance.

Front

What is a chemical change?

Back

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

Front

Can you name the three states of matter?

Back

Solid, liquid, gas.

Front

What happens to the molecules in a solid when it melts?

Back

They gain energy and move apart.

Front

What is an example of a chemical change?

Back

Burning wood.