Lava Lamp

1. Fill the water bottle up till it is two thirds full.
2. Add 2-3 drops of food colouring to the water.
3. Pour in a small quantity of oil, just enough to form about a 2cm layer on top of the water.
4. Sprinkle a few pinches of salt onto the oil and watch what happens.
5. Keep adding salt to make your experiment last longer.

Passive Voice

1. A bottle is filled up until it is two thirds full

2. 2-3 drops of food colouring is added to the water

3. A small quanity of oi is poured, just enough for a 2cm layer to be formed on top of the water.

4. A few pinches of salt are sprinkled onto the oil as their happenings are being watched :)

5. Salt is kept adding so that the experiment lasts longer