Convection Crossword

Convection Crossword

Across

3. ***** density fluid floats on

higher density fluid

5. The coldest part of a hot water tank

7. Air and methane are these

8. The path taken by convection flow

11. A liquid or a gas

15. Potassium ************ has a

purple colour

17. The name given to rising air

currents caused by the sun

18. Examples include water and oil

19. *** fluids are less dense than

cold ones

20. The hottest part of a hot water tank

21. What cold water does when

placed into hot water

Down

1. ********* permanganate can by used

to dye water

2. A *** breeze is an example

of a convection current

4. A sea breeze blows towards this

6. What substances are made of

9. Hot gas ***** above cold gas

10. Heated air *******

12. A way in which heat moves through

fluids but not solids

13. What changes in a liquid when

it is heated

14. These heat a room by convection

16. A gas that allows convection

21. Convection cannot take place

through these