We did a really quick but fun science experiment this week. We've been learning about states of matter and looking at properties of materials. What does this "dancing raisins" experiment show us?
Fill up a glass with 7up and drop in a few raisins. The carbon dioxide bubbles in the 7up rise to the top as they are lighter. As they do this, they sometimes attach themselves to raisins and drag them up too. When the bubbles reach the top they escape and gravity forces the raisins to fall again as they are heavier than the 7up!
Today we made a circuit. Firstly we got into groups. I was with Adam, Jordan and Dónal. Secondly Ms. Ryan handed out all the batteries and wires. Next we attached the wires to the battery. Then we put the bulb to the wires. Eureka! The light bulb had turned on. It was a lot of fun and I would love to do it again!
Have a look at the video below to see how we got on!
For Science Week recently we made fire extinguishers!
Here is what we did:
The second experiment we did was making fire extinguishers. The equipment we used were empty toilet rolls, vinegar, baking soda and a candle. First we put the baking soda into the vinegar. All the vinegar fizzed up and made carbon dioxide. We then used the empty toilet rolls to aim the carbon dioxide at the lit candle. That put out the candle.
(By Jordan and Conor)
Toilet roll holders
Light the candle.
Fill the cup with a little vinegar
put a tsp of baking soda in the cup
we used the toilet roll holder to aim the carbon dixode
then the flame went out.
(By Max and Eoghan)
For the next experiment we had a plastic glass and 1/8 of it was full with vinegar.
Next Mr Lane came around and lit our candle.
After that Mr Lane came around with baking soda. We poured it into the vinegar.
It fizzed up and finally we directed the carbon dioxide towards the candle.
It blew out and we finished our very fun experiment thanks to Mr Lane.
(By Paddy and Jamie O.)
How does it work?
Mixing vinegar and baking soda produces carbon dioxide. Then, as carbon dioxide is heavier than air, you can use empty toilet rolls to aim the carbon dioxide down at a candle flame. Fire needs oxygen in order to burn so when the carbon dioxide falls on the flame it suffocates it and the flame goes out.
Have a look at the video below to see our fire extinguishers in action!