Name::

1 The gas used up when things burn is . oxygen hydrogen carbon dioxide .

2 The gas given off when lemonade goes fizz is . oxygen hydrogen carbon dioxide

3 The gas that burns with a squeaky pop is . oxygen hydrogen carbon dioxide

4 When fuels burn in air, light and . oxygen hydrogen heat are produced.

5 . acids alkalis react with metals and eat them away.

6 Gold does not change when put in acid because it is . pure unreactive

Complete these sentences:

7 When pancakes are cooked they go solid. This is because a creaction takes place.

9 The fire triangle shows that to have a fire you need a fuel, oxygen and .

10 If a person’s clothes catch fire, you roll them up in a blanket. This removes from the fire, so it goes out.

11 If you have a problem in the laboratory, the teacher turns off the

gas at the mains. This removes from the fire.

12 Fire-fighters spray water on fires. This removes from the fire.