Lava Lamp in a Bottle

Aim:

 Our aim is to make a lava lamp in a bottle.

Equipment: 

• Beaker
• Oil
• Water
• Food colouring
• Bottle
•  Eye dropper

Method:

Step 1: Pour 200ml of cold water into a one letter bottle.

Step 2: Add 500ml of oil into the bottle.

Step 3: Pour three or four drops of food colouring into the mixture.

Step 4:Drop half of an alka-seltzer tablet into the bottle.

Step 5: Observe and record.

Results:

In experiment one when we added the alka-seltzer tablet the bubbles slowly rose.The second experiment was different.The bubbles rose along the side of the bottle. The reaction  was shorter. The third experiment had larger bubbles and lasted longer. Finally experiment 4 was the most effective.The bubbles were both smaller and larger. There were many more bubbles than the others. The reaction lasted a long time.

Conclusion:

The alka-seltzer made the mixture react because when it hits the water it reacts and makes the coloured  water bubble through the oil. A proper lava lamp heats up the oil which makes it less dense. It causes tiny bubbles of gas to rise. When it gets to the very top the bubbles pop and the colour falls to the bottom. This will carry on and on until the light is turned off. It will still work for ten to twenty minutes with out the light on before it cools down.

By Madison Lynskey-Reid.

Plastic milk

  Our aim  is to try to make plastic milk.

Equipment: Beaker, Bowl, 800w microwave, strainer, (200 ml of milk), water and a teaspoon 

Method:

Step 1: Pour  200 ml of milk into the beaker.

Step 2: Heat it for 50 secs in a microwave.

Step 3: Put 4 teaspoons of vingar into the heated milk.

Step 4: Stir the heated milk and vinegar gently.

Step 5: Strain the mixture through the strainer. 

Step 6: Rinse the strainer.

Results:

The plastic milk had a horrible vinegar smell. Also it was a little bit white and looked off. It felt quite squishy. 

 

Conclusion: 

The hot milk with the vinegar made the plastic milk. Whey comes from cheese. When cream is pressed  while making cheese it separates out into two parts. The curd portion is used further in making the cheese, while the leftovers are called whey.

Next week we are using . . .

By Aieshah Whiu-Bennett :)

Can You Get Plastic Out of Milk?

Prediction: I think the milk will fizz up and explode.

Equipment: 1 cup of milk, sieve, bowl, teaspoon, vinegar.

Method: 
1.    Put one cup of milk into bowl. 
2.    Warm up green milk in microwave for 50sec in an 800watt microwave. Blue milk needs to go in an 800watt microwave for 1min. 
3.    Add four teaspoons of vinegar to the milk. 
4.    Stir the mixture gently. 
5.    Strain the solution through the sieve. 
6.    Rinse and sieve the Casein.

Result: I made a substance that is crumbly and feels like squishy plastic. A vinegar smell is given off by the Casein which also has a white scrambled egg appearance. It sounds like heaps of little pops as you squish it. After a day it has a harder surface. It smells like vinegar and looks like dried up cheese. Now it does not make any noise when you squish it.

Conclusion: We made a substance called Casein (Latin word for cheese). Casein occurs when acid meets milk. The Casein in milk does not mix with acids so it forms blobs. The non-scientific word for Casein is Curd. Casein is used to make cheese. Whey is also used for ricotta, brown cheeses and animal feed.