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Yr 5's Lava Lamp Creations

 

In Science, Year 5 created lava lamps by mixing oil with water, food colouring and adding an effervescent tablet.

 

May be an image of 4 people, child, people sitting, people standing and indoor

 

We noticed that the oil floated on top of the water because it is less dense and lighter than water. The two liquids separated.

 

May be an image of 3 people, child, people standing and indoor

 

The food colouring has the same density as the water so it sunk through the oil and mixed with the water, causing a physical change.

 

May be an image of 4 people, child, people sitting, people standing and indoor

 

The tablet sunk to the bottom and started to dissolve, creating bubbles and forming a gas.

 

May be an image of 4 people, child, people standing and indoor

 

This was a chemical change. As air is lighter than water, the air bubbles floated to the top.

 

May be an image of 4 people, child, people sitting, people standing and indoor

May be an image of 3 people, child, people standing and indoor