STEM WEEK

Today in our STEM activity groups we took part in a Science investigation – How to make a oil lava lamp.

We used our hypothesis: Can I create a gas using only a solid and a liquid? to carry out the investigation.

We used equipment: measuring jug, funnel, vegetable oil, plastic clear bottle with lid, food colouring, glitter and Alka-Seltzer tablet.

We made predictions: We thought that when the items were mixed it will give a lava lamp effect.

We discussed our method as a group. We came to the conclusion that the solid (Alka-seltzer tablet) reacted to the water and oil to make bubbles of carbon dioxide gas. The more Alka-Seltzer went in the more bubbles and reaction took place.

Some of our liquids even moved around inside the bottle!!

Our results showed us that oil is less dense that water therefore it sits on the top of the water. Also when the gas escapes the water and oil separates into two layers again.

Check out our amazing photos!

Well done for today’s hard work boys and girls! At home, you can shine a torch behind or underneath your lava lamp to see it glow.

Have a lovely October Break and I will see you back after the holidays! πŸ™‚

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