Generation Genius: Physical & 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 changing its chemical composition.

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What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Front

What happens to the candle when it burns?

Back

When a candle burns, it undergoes a chemical change as it transforms wax and oxygen into carbon dioxide and water.

Front

What is the role of oxygen in burning?

Back

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

Front

What is carbon dioxide?

Back

Carbon dioxide is a gas produced when substances burn, and it can cause candles to go out if it accumulates.

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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

What happens when you mix air into egg whites?

Back

Mixing air into egg whites is a physical change because it changes the texture but not the chemical structure.

Front

What are states of matter?

Back

States of matter are the distinct forms that different phases of matter take on, such as solid, liquid, and gas.

Front

What is melting?

Back

Melting is the process of a solid turning into a liquid, which is a physical change.