In science we did a experiment for elephant toothpaste. It's fun because you can see the bubble going up. Science is fun because you can do some fun experiment but it can also be dangerous.
Elephant’s Toothpaste
Resources:
Safety glasses
A cylinder
Rubber gloves
A tote tray to protect the bench from damage
120ml Hydrogen Peroxide 6%
Dishwash liquid
Dry yeast ,,
Food colouring
Funnel
Tablespoon
Beaker
Procedure:
Put on your gloves and goggles.
Put a tote tray on the bench and put your cylinder in the tote tray, with the funnel in the top.
Ask the teacher to pour the hydrogen peroxide into your cylinder (via the funnel).
Add 10 drops of food colouring to the cylinder (via the funnel).
Add a tablespoon of dishwashing liquid to the bottle (via the funnel).
Swirl your cylinder around to mix everything together.
In a beaker, mix a tablespoon of dry yeast with 3 tablespoons of warm water and stir for 30 seconds.
Pour the yeast mixture into the cylinder (via the funnel).
Stand back and watch the chemical reaction!
Pour the mixture down the drain afterwards and wash out the cylinder.
Scientific Explanation (How it works):
The yeast and water mixture acts as a catalyst - something that speeds up a chemical reaction in another substance, while remaining unchanged itself. When you add this to the cylinder it makes the hydrogen peroxide break down into oxygen and water. "Also the toothpaste almost explode out of the cylinder".
Is your cylinder warm after the experiment? Why? Yes, because when you mix all the chemical it will make it warm enough so you can't touch it.
Hi Lars you have included a super photo of your blue elephant's toothpaste! Well done on getting this post completed in the short time that we had. We will have more time this week so hopefully you can go into more detail about why science is fun and how is can be dangerous.
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