1. Unit 5D: Changing State

2. Changing State

3. Unit 5D: Changing State: Vocabulary Unit 5D: Changing State Some useful words Evaporation Condensation Boiling temperature State Change of state when a liquid changes to a vapour (gas) when a vapour changes to a liquid the temperature at which a liquid boils, for water it is 100 C the 3 states are solid, liquid and gas when a substance changes from one state to another

4. Unit 5D: Evaporation: L.O. 1, 2: N.C. Unit 5D: Evaporation Evaporation

5. Unit 5D: Other liquids: L.O. 3: N.C. Unit 5D: Other Liquids Other liquids

6. Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C. Unit 5D: How quick does a puddle dry up? How quick does a puddle dry up? Which puddle do you think will dry up the quickest? Why do you think this? What factors do you think affect how quickly a puddle dries up? Choose one of these to investigate Temperature Wind Volume of water Surface area of puddle

7. Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C. Unit 5D: How quick does a puddle dry up? …cont Make a prediction. What do you think you will find? What apparatus will you need? Explain how you will carry out your experiment? What will you measure? How will you record your results? How will you keep the test fair?

8. Unit 5D: How quick does a puddle dry up? L.O. 4, 5, 6, 7, 8: N.C. Unit 5D: How quick does a puddle dry up? Support slide The bowls represent puddles with different surface areas Which of the bowls of water do you think will dry up the quickest? Why do you think this? To make sure the test is fair, each ‘puddle’ must have the same volume of water in it and they need to be kept in a room at the same temperature. The time it takes for each ‘puddle’ to evaporate needs to be recorded. We will check the ‘puddles’ every day to see which evaporates the quickest

9. Unit 5D: Drying: L.O. 9: N.C. Unit 5D: Drying Drying How do these appliances help things dry more quickly?

10. Unit 5D: Condensation: L.O. 10, 11, 12: N.C. Unit 5D: Condensation Condensation Where else do we see condensation?

11. Unit 5D: More Condensation: L.O. 13, 14: N.C. Unit 5D: More Condensation More Condensation

12. Unit 5D: Boiling Water: L.O. 15: N.C. Unit 5D: Boiling Water Boiling Water

13. Unit 5D: Melting Ice: L.O. 18, 19: N.C. Unit 5D: Melting Ice Melting Ice Take the temperature of the ice and water every 5 minutes for 2 – 3 hours. Record the results. TimeTemperature

14. Unit 5D: Melting Ice: L.O. 18, 19: N.C. Unit 5D: Melting Ice …cont What temperature did you end up at? What do you think would have happened if the room was 10 degrees hotter?

15. Unit 5D: Change of State: L.O. 20: N.C. Unit 5D: Change of State Change of State

16. Unit 5D: The Water Cycle: L.O. 21, 22, 23, 24: N.C. Unit 5D: The Water Cycle The Water Cycle

17. Unit 5D: Changing State: Summary Unit 5D: Summary Changing state Evaporation Liquid > Gas Not just water Depends on Temperature Volume of water Wind Surface area Boiling Liquids evaporate quicker Water boils at 100ºC Water cycle Reversible Condensation Gas > Liquid Reverse of evaporation Air contains water Condenses on a cold surface Bedroom window Cold pop can Melting Freezing Evaporating Water evaporates from lakes Condenses as clouds Falls as rain Collects in rivers Process starts again