Heat and light. Unit 8. 4ºgrade

1 What is heat?

2 What is temperature?

3 Why do we see an object blue?

4 Why do we see an object red?

5 Why do we see an object white?

6 Why do we see an object black?

7 What colour is an object that does not reflect any colour of light?

8 What colour is an object that does not absorb any colour of light?

9 Are these materials conductor or insulator materials?
- glass
- silver
- silk
- aluminium
- steel
- wool
- wood
- paper

10 What happens when we heat something up?
   1.-
   2.-
   3.-

11 What happens when we heat water over 100ºC?

12 What happens when we heat up a glass of milk in the microwave?

13 What happens when we heat solid ice?

14 What happens when we cool something down?

15 What temperature does water boil at?

16 What temperature does water freeze at?

17 What are the properties of light?
   1.-
   2.-
   3.-

18 Natural or artificial source of light?
- sun
- a light bulb
- stars
- a torch

19 What is refraction?