Physical and Chemical Mixtures

What is a mixture?

• A type of chemical reaction.

• A combination of two or more substances that are not chemically joined.

When you mix sugar and water you create _________________ .

• a solution

• a solid

• a mixture

What happens when you mix vinegar and baking soda?

• They form a solution.

• They produce a chemical reaction with fizzing and bubbling.

• They turn into a solid.

Is melting an ice cube a reversible or irreversible change?

• Reversible

• Irreversible

Folding a paper into an aeroplane is an example of:

• a reversible change

• an irreversible change

Which of the following changes is reversible?

• Burning a piece of paper.

• Baking a cake.

• Mixing salt in water.

What happens when you mix oil and water together?

• They form a solution.

• They separate into layers.

• They become solid.

What change occurs when you cook an egg?

• A physical change

• A chemical change

What type of change takes place when you light a candle?

• A physical change

• A chemical change

Which of the following is NOT a sign of a chemical reaction?

• Bubbling and fizzing

• A change in colour

• Melting