Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is the freezing point of water?

Back

The freezing point of water is 0 degrees Celsius (32 degrees Fahrenheit).

Front

What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its identity.

Front

What is a chemical property?

Back

A chemical property is a characteristic that can only be observed during a chemical reaction.

Front

What happens to water when it freezes?

Back

When water freezes, it changes from a liquid to a solid state.

Front

What is the boiling point of water?

Back

The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at sea level.

Front

Why can't we see atoms?

Back

Atoms are too small to be seen with the naked eye.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

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 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.