This question is about physical changes and chemical changes.
The table shows some changes that happen in a kitchen.
| Change | Physical or chemical? |
|---|---|
| butter melting in a warm pan | ? |
| an egg being fried | ? |
| steam forming droplets on a cold lid | ? |
| sugar dissolving in water | ? |
Complete the table. Write physical or chemical in each row.
Which two statements about physical changes are correct?
Statement 1: A new substance is made.
Statement 2: The change is usually easy to reverse.
Statement 3: The particles stay the same.
Statement 4: The particles join together to make different particles.
Statement 5: Heat and light are always given out.
Write the numbers of the two correct statements.
A student heats some white baking powder. A colourless gas is given off. The white solid that is left behind is a different substance.
Is this a physical change or a chemical change?
Give a reason for your answer.
Ice melts to make liquid water.
State what happens to the mass of the water when it melts.
48 exam-style questions on OCR GCSE Chemistry 1.1 The particle model, covering 1.1.1 The particle model and changes of state and 1.1.2 Limitations of the particle model. Each one has a worked solution and a mark scheme showing where the marks go.