Physical and Chemical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties.

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

Give an example of a chemical change.

Back

Burning wood is an example of a chemical change.

Front

Give an example of a physical change that happens in your body.

Back

Food being broken down into small pieces by your teeth is a physical change.

Front

What happens to glass when it breaks?

Back

When glass breaks, it undergoes a physical change.

Front

What are some indicators of a chemical change?

Back

Indicators of a chemical change include a change in color, production of light, heat, gas, smell, or formation of a new substance.

Front

What is density?

Back

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

Front

How do you calculate the volume of a cube?

Back

The volume of a cube is calculated using the formula V = side³.

Front

What is the density of an object that has a mass of 5g and a volume of 10cm³?

Back

The density is 0.5 g/cm³.

Front

Is melting ice a chemical or physical change?

Back

Melting ice is a physical change.