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6D Reversible and irreversible changes

6D Reversible and irreversible changes. What do you know?. 1. You can separate a mixture of sugar and water by. Filtering it Letting the water evaporate Letting the salt evaporate Stirring it. Response Grid. 2. An irreversible change is one where. No new materials are made

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6D Reversible and irreversible changes

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  1. 6D Reversible and irreversible changes What do you know?

  2. 1. You can separate a mixture of sugar and water by... • Filtering it • Letting the water evaporate • Letting the salt evaporate • Stirring it Response Grid

  3. 2. An irreversible change is one where... • No new materials are made • You can get a coloured liquid • One material dissolves • A new material is made Response Grid

  4. 3. One way to tell that a change is irreversible is if: • You can see bubbles of gas • You can see a liquid • A solid material disappears • The mixture goes white Response Grid

  5. 4. Which is an example of a reversible change caused by heating? • Condensing • Freezing • Melting • Baking a cake Response Grid

  6. 5. Which is an example of an irreversible change caused by heating? • Melting • Evaporating • Firing clay • Freezing a loaf of bread Response Grid

  7. Participant Scores

  8. 6. Cooling something down can cause.. • A reversible change such as freezing • A reversible change such as melting • An irreversible change such as freezing • An irreversible change such as melting Response Grid

  9. 7. Burning is an irreversible change because... • Fires are hot • Fires can be dangerous • No new materials are made • New materials are made Response Grid

  10. 8. Which material is not produced by burning? • Ash • Wood • Invisible gas • Smoke Response Grid

  11. 9. Which of these is not a sensible safety rule • Never play with matches • Unplug electrical equipment when it is not being used • Do not play near fires • Always dry clothes close to a fire Response Grid

  12. Participant Scores

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