Topic 1 Rewind

Front

What is a physical change?

Back

A physical change is a change that alters the form or appearance of a material but does not make the material into another substance. Example: Melting ice.

Front

What is a chemical change?

Back

A chemical change is a change that produces new substances with different properties. Example: Rusting iron.

Front

Give an example of a physical change.

Back

Melting ice.

Front

Give an example of a chemical change.

Back

Burning wood.

Front

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

Back

The properties of substances change because new substances are formed.

Front

What is a solvent?

Back

A solvent is a substance that dissolves a solute, resulting in a solution. Example: Water in Kool-aid.

Front

What is a solute?

Back

A solute is a substance that is dissolved in a solvent. Example: Sugar in Kool-aid.

Front

How do you determine which solution is more concentrated?

Back

Compare the amount of solute in a given volume of solvent. The solution with more solute is more concentrated.

Front

What is the difference between physical and chemical changes?

Back

Physical changes do not produce new substances, while chemical changes do.

Front

Why is burning wood considered a chemical change?

Back

Because it produces new substances with different properties.