Elephant's toothpaste

This Friday in science we learnt how make Elephant toothpaste. I was in a new group with Axle and Jeff. Basically, it is a mixture of Hydrogen peroxide, Dish washer liquid, food coloring and dry yeast. The reaction was caused  by rapid decomposition of hydrogen peroxide making use of yeast as the catalyst. The interesting part of the experiment was when the yeast mixing together with the hydrogen peroxide and dish washing liquid. 

Here are some photos that we took:

Elephant’s Toothpaste          7.9.2018

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:

1. Put on your gloves and goggles.
2. Put a tote tray on the bench and put your cylinder in the tote tray, with the funnel in the top.
3. Ask the teacher to pour the hydrogen peroxide into your cylinder (via the funnel).
4. Add 10 drops of food colouring to the cylinder (via the funnel).
5. Add a tablespoon of dishwash liquid to the bottle (via the funnel).
6. Swirl your cylinder around to mix everything together.
7. In a beaker, mix a tablespoon of dry yeast with 3 tablespoons of warm water and stir for 30 seconds.
8. Pour the yeast mixture into the cylinder (via the funnel).
9. Stand back and watch the chemical reaction!
10. 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. The dishwashing liquid traps the oxygen in bubbles to create the foam. Just a small amount of hydrogen peroxide will create a lot of oxygen, so you get loads of bubbles - making your ‘toothpaste’ almost explode out of the cylinder.

Extra for experts:

1. Is your cylinder warm after the experiment? Why? The cylinder was warm because of the chemical reaction which produced energy in the form of heat.

Commenting challenge

This is my blog post I did in Cybersmart about the commenting challenge I am doing with my class and another class. I was explaining to you guys how to comment on someone's blog if you didn't already know. I hope you enjoy and please leave a comment.

Wizard wand - Kete

This is my friend and I's advertisement we did on a google slide. We did this in kete and had to present it in front of our class. I was very nervous but once I got into it, I was happy. 

Our product was a wizard wand and it was fun pretending to convince people to buy one. Hope you enjoy:)   

Equipment in science

Today I am going to show you all the equipment in science in sentences. Hope you enjoy. 

  
Beaker: A beaker is used for holding liquid. 





Measuring cylinder: A measuring cylinder is used to measure volumes of liquids.





Test tube tongs: A Test tube tongs are used to hold test tubes.




Spatula: A spatula is used for scooping powder.



Stirring rod: A Stirring rod is used for stirring chemicals.




Dimple tray: A dimple tray is used for watching (observing) chemicals change.



Conical flask: A conical flask is used for mixing liquid.



Thermometer: A thermometer is used for measuring the temperature of a liquid.




Tripod: A tripod is used for holding a beaker/ flask above a flame.




Bunsen burner: A Bunsen burner is used for heating experiments.




Scissor tongs: A scissor tong are used for holding hot objects.


Gauze mat: A gauze mat is used to evenly spread a flame under a beaker.

Heat mat protect: A heat mat protects the bench from burning.

What does respecting people look like? - Philosophy

 

This is my philosophy blog post that I created with my group Shontelle and Hope. In philosophy we were talking about what respecting people, places, properties and beliefs look like. So we chose what does respecting people look like?. Here's a mindmup of what respecting people looks like.

Hope you enjoy :)      

Making a paper clip float - Science

Making a paper clip float

The left photo is the sunken paper clip and the right photo is the floating paper clip with a piece of tissue.

 Today my class and I did a science experiment called making a paper clip float. It's not that amazing but it was easy to do. I did it with my partner Shontelle and it was a success. I was happy and so was my partner. 😁

We needed:

Clean dry paper clip

tissue paper

A beaker filled with water

Pencil

What to do

1. Fill the bowl with water
2. Try to make the paper clip float…not much luck, huh?
3. Tear a piece of tissue paper about half the size of a CARR card.
4. GENTLY drop the tissue flat onto the surface of the water
5. GENTLY place a dry paper clip flat onto the tissue (try not to touch the water or the tissue)
6. Use the eraser end of the pencil to carefully poke the tissue (not the paper clip) until the tissue sinks. With some luck, the tissue will sink and leave the paper clip floating!

It works with a little thing that scientist call it surface tension. Scientist say that there is a sort of skin on the surface of water that might be making the paperclip float. The paper clip is truly not floating, it is being held up by the surface tension.     

Blobs in a bottle

Today in science with my group Hope and Addyson, we made a lava lamp in a empty coke bottle. We each got a turn of adding the ingredients in and it was fun. Our lava lamp didn't do what we expected to be but it was success. 

Oil is lighter than water so stays on top of the water. The quick - Eze go through the oil into the water and start to dissolve. When they dissolve they send bubbles up through the oil.

Here are some photos and the ingredients.

The ingredients:
3/4 cup if Water
Vegetable oil 
Food coloring
Quick Eze / Mylanta tablets

I hope you enjoyed my blog post.