Starter quiz
- Which picture shows an insoluble substance?
- Mass is measured in ...
- centimetres.
- millilitres.
- grams. ✓
- centimetres-cubed.
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- Sugar dissolves in water, so sugar can be described as a ______ solid.
- 'soluble' ✓
- A ______ is a material formed from two or more substances which can be physically separated.
- 'mixture' ✓
- Some students have been asked to describe this diagram using key terms. Who has used their key words correctly?
- That shows a pure liquid.
- I think that might be a liquid mixture.
- I'm fairly certain this shows an impure solid.
- I reckon that's a pure solid. ✓
- Melting is a reversible, physical change. Which of the following statements is also true about melting?
- Melting is what happens when a substance disappears.
- Melting occurs when solid particles become more regularly arranged.
- Melting is the process of a substance disappearing in a liquid.
- Melting occurs when solid particles become more irregularly arranged. ✓
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