Intro to Matter

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What are the three states of matter?

Back

The three states of matter are solid, liquid, and gas.

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in g/cm³.

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What happens to the density of a substance when it changes from solid to liquid?

Back

The density may change, but during a change of state, the mass remains constant.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, often referred to as heat energy.

Front

What occurs during melting?

Back

During melting, a solid turns into a liquid as heat is added, and the temperature remains constant until the entire solid has melted.

Front

What is the boiling point of water?

Back

The boiling point of water is 100°C (212°F) at standard atmospheric pressure.

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 occurs when a substance transforms into a different substance with different properties.