Chemical vs. Physical Changes

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often 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

Can you give an example of a chemical change?

Back

Burning wood is an example of a chemical change because it transforms the wood into ash and smoke.

Front

Can you give an example of a physical change?

Back

Melting ice is an example of a physical change because it changes from solid to liquid but remains water.

Front

What happens to the gas when a candle burns?

Back

When a candle burns, it produces carbon dioxide and water vapor, which are gases.

Front

What is the role of oxygen in burning?

Back

Oxygen is necessary for burning; it reacts with the material to produce heat and light.

Front

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

Back

The properties of a substance change during a chemical change because new substances are formed.

Front

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

Back

The properties of a substance may change in appearance or state, but the substance itself remains the same.

Front

What is an example of a mixture that undergoes a physical change?

Back

Blending fruits together is a physical change because the fruits keep their original properties.

Front

What is an example of a gas produced during a chemical change?

Back

Carbon dioxide is a gas produced when substances like candles burn.