Physical and Chemical Changes

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 is a process where one or more substances are transformed into different substances with distinct properties, often called a chemical reaction.

Front

What are the three main states of matter?

Back

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

Front

What happens to the particles in a solid when it is heated?

Back

When a solid is heated, its particles gain energy, vibrate more, and may eventually change to a liquid state.

Front

What happens to the particles in a gas when it is cooled?

Back

When a gas is cooled, its particles lose energy, move closer together, and may condense into a liquid state.

Front

What is the definition of a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is an example of a physical change?

Back

An example of a physical change is melting ice into water.

Front

What is an example of a chemical change?

Back

An example of a chemical change is rust forming on iron.

Front

How does temperature affect the state of matter?

Back

Temperature affects the state of matter by providing or removing energy, which can cause substances to change from solid to liquid to gas, or vice versa.

Front

What is the shape of a solid?

Back

A solid has a definite shape and volume.