Chemical and Physical Changes

Front

What is a physical change?

Back

A physical change is a change in which the form or appearance of a substance changes, but its chemical composition remains the same. Examples include melting, freezing, and shredding.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning wood, rusting iron, and baking a cake.

Front

What happens to the mass of matter during a physical change?

Back

The mass of matter remains the same during a physical change.

Front

What happens to the mass of matter during a chemical change?

Back

The mass of matter remains the same during a chemical change, according to the law of conservation of mass.

Front

Is melting ice a physical or chemical change?

Back

Melting ice is a physical change.

Front

Is burning wood a physical or chemical change?

Back

Burning wood is a chemical change.

Front

If you mix 1 gram of salt with 50 grams of water, how many grams of matter will you have after the salt is completely dissolved?

Back

51 grams.

Front

What is an example of a physical change?

Back

Shredding a piece of paper is an example of a physical change.

Front

What is an example of a chemical change?

Back

Rusting of iron is an example of a chemical change.

Front

What happens to the properties of a substance during a chemical change?

Back

The properties of a substance change during a chemical change, resulting in new substances.