1. Do now! Can you sit down quickly and quietly?

2. Books Write a title please – It’s year 8, sometimes you have to figure out the title yourself!

3. Books Underline titles!

4. Books If Mr Porter writes “can you finish this please”…..finish it!

5. Books Continue the next piece of work immediately after the previous – no blank spaces please!

6. Books Use the target sheets to revise

7. Books Neatness!

8. Spelling!

9. Cooling

10. What did you do? Why do you think Mr Porter is using this picture?

12. Cooling curve In the experiment, you will have noticed that the temperature of the wax stopped changing as the waxchanged from a liquid to a solid. Temp (°C) Time (mins) Melting point

13. Cooling curve This always happens during a change of state Temp (°C) Time (mins) Melting point

14. Cooling curve Why does this happen?

15. Latent heat When the molecules of a substance settle into the regular pattern of a solid, energy is released as bonds are formed. This energy released is called latent heat. This stops the temperature from falling. Energy released (“latent” = “hidden”)

16. Latent heat The opposite happens when a solid melts. Heat is needed to break the bonds between the solid particles (instead of raising the temperature) Temp (°C) Time (mins) Melting point solid liquid Energy absorbed

17. Melting ice Heat energy is needed for converting ice at 0 º C to water at 0 º C This heat energy is needed to melt the ice, NOT make it hotter 0°C

18. Freezing water Heat energy is released when water at 0 º C is converted to ice at 0 º C This heat is keeps the temperature constant whilst the water is freezing. 0°C

19. Evaporating water Heat energy is absorbed by the water when changing to a gas, keeping the temperature constant. 100°C

20. Got it?

21. Can you read pages 114 and 115 of your book? In silence please

22. Can you read pages 114 and 115 of your book? Can you answer the questions on the pages?

23. Just time for a quick dog accident 50 kg

24. Ooops! 50 kg