Modeling Matter

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are molecules?

Back

Molecules are the smallest pieces of matter that still retain the properties of that matter.

Front

What is a property of matter?

Back

A property of matter is a characteristic that can be observed or measured, such as color, hardness, or brittleness.

Front

What happens to particles when a substance evaporates?

Back

The particles move faster and the substance changes into a gas.

Front

What is the difference between a solid, liquid, and gas?

Back

Solids have a definite shape and volume, liquids have a definite volume but take the shape of their container, and gases have neither a definite shape nor volume.

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

Burning wood is an example of a chemical change.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically combined.

Front

How do scientists separate mixtures?

Back

Scientists use the properties of molecules, such as size or solubility, to separate mixtures.

Front

What is evaporation?

Back

Evaporation is the process by which a liquid changes into a gas.