Alchemy

Alchemy

Today we did Alchemy experiment it was amazing, because the colour of the coin was changed.It's very cool I like it.

Alchemy 21 September 2018

Aim:  

I want to find out how to turn a copper coin into gold.

Equipment:

• Copper coin
• Bunsen burner
• Tripod
• Heat mat
• Gauze mat
• 50ml beaker
• Scissor tongs
• Zinc metal
• Zinc Nitrate solution

Method:

1. Put your safety glasses on.
2. Set up heating equipment.
3. Add 50ml of Zinc Nitrate to the beaker.
4. Add the strips of zinc metal into the solution.
5. Heat the beaker with a blue flame.
6. Once the solution is boiling, add the Copper coin on top of the Zinc.
7. Wait for 10mins.
8. Using scissor tongs, get the coin and wash it under water.
9. Still holding the coin with the scissor tongs, hold the coin in the blue flame.

Orana park

                                                                      Orana park

                     Yesterday we went to the Orana park learn and see the interesting animals that's my first time went to the zoo.
                      We went to the Orana park see the Kiwi, Spider monkeys, Giraffe, Rhino, lions, Cheetah, Zebras, Tigers, Tasmanian......
                 
           KIWI:
                     
Kiwi have strong legs to kick predators. They're legs aren't hollow like birds who fly. Kiwi only eat insects that are alive. Kiwi carry their egg for 28 days. At 6 weeks old kiwi chicks leave their mum. Female kiwi are larger to carry the eggs.They have no tail and their wings are under-developed.

         Spider monkeys:

    

Spider monkeys have a thumb print on the end of their tail.They use their tail for balance.














                     

Ice experiment

Today we make Ice Cold. We have ice cube,salt,bowl and matches. First we have a bowl of cold water and put the ice in the cold water, and take matches put ice and matches together .If the ice and matches together is finish, if not together is not finish you must do again. Is fun I like it.

Ice Cold

You will need;

• A bowl of cold water
• A matchstick
• An ice cube
• Table salt

Instructions:

1. Place the ice cube carefully in the bowl of cold water
2. Gently place the match lengthwise on top of the ice and try to lift the ice cube
3. Put the matchstick back on the ice and sprinkle a little salt along the line where it touches the ice cube
4. Wait for 30 seconds and then attempt to pick up the ice cube again

What’s the science?

At first the ice cube and water are in equilibrium meaning that the rate of freezing and melting is the same.

The salt lowers the rate at which the water freezes, so the ice melts faster.

This releases lots of energy in the form of heat, so everything gets colder, including the ice cube. Where there’s no salt (under the match) the ice cube refreezes, freezing the match in place.

Extra for experts:

Why do we sprinkle salt on icy roads? So the ice melts faster.

Elephant's Toothpaste

This week Friday in science we learnt to make Elephant’s Toothpaste

Like that ( under here ). It was fun!  

 

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?
2. warm.
3. Your experiment created a reaction called an Exothermic Reaction - that means it not only created foam, it created heat.