C1.1.2 - Chemical/Physical Changes

Question 1

What happens in a physical change? (4)

Answer 1

• Substance changes state
• Changes shape/breaks
• No new substances are made
• Many can be reversed

Question 2

Examples of physical changes? (2)

Answer 2

• Freezing water
• Dissolving sugar in water

Question 3

What is a chemical change? (3)

Answer 3

• Produces a new substance and may change state
  —> Properties of new substance very different from original
• Many difficult to reverse

Question 4

Examples of chemical changes? (2)

Answer 4

• Cooking
• Rusting