Chemical and Physical 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. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and reacting with acids.

Front

What happens to the mass of a substance during a physical change?

Back

The mass of a substance remains the same during a physical change.

Front

What happens to the mass of a substance during a chemical change?

Back

The mass of a substance is conserved during a chemical change, but it may change forms or combine with other substances.

Front

Give an example of a physical change.

Back

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

Front

Give an example of a chemical change.

Back

An example of a chemical change is baking soda reacting with vinegar to produce carbon dioxide.

Front

What is the mass of 100 grams of sand, 200 grams of soil, and 200 grams of pebbles combined?

Back

The mass of the combined potting soil is 500 grams.

Front

What is the weight of a pencil?

Back

The weight of a pencil is about 5 grams.

Front

What is the result of burning wood?

Back

Burning wood is a chemical change that produces ash, smoke, and gases.

Front

What is the definition of mass?

Back

Mass is a measure of the amount of matter in an object, typically measured in grams or kilograms.