Science

In Term 4 We made borax crystals. First of all we brought our jars to school. Then the teacher gave us a demonstration. She Started of with making a shape. She made a snowflake shape. Then She told us that we had to hang it of the pencil so it dosen't touch the bottom. After that she poured boiling hot water in the jar. Finnaly, she told us we could add food die into it. I added green food die to my crystal.

1 week after we had made the borax crystals, Ms. Balati gave us a sheet for us to plan and design our own flame extinguisher. The flame we made was a small candlelight so we needed to make carbon dioxide. Here is the ingredients me and Adam used: Plasticine, Plastic Bottle, Vinegar, Bicarbonate of soda, and a straw that bends. First of all you get the plastic bottle and stick the straw through the Plasticine. Then you get an adult to put the two ingredients in. Cover the straw with your finger and when it is in position, remove your finger. If it works right there would probably be enough carbon dioxide to take out the small flame.

Equipment: Plastic Container, Water, Bicarbonate of soda, vinegar and sultanas. Prediction: When we pour the Bi-Carb soda and vinegar into the container the sultanas will start bobbing up and down. Diagram:

Observation: When we added the vinegar and the Bi-Carb Soda into the container it fizzed and made bubbles on the raisins. The raisins rose to the surface of the water, the bubbles popped, and the raisins sunk. Conclusion: The Bi-Carb soda and the vinegar formed a chemical reaction and a gas named Co2 was formed. The gas bubbles make the raisins float because gas is lighter than liquid, & when the bubbles popped the raisins sink because solids are heavier than liquids.

This is a power point i made on the coldest places on earth.



Utencils: Plastic Bottle, Mesuring Cup, Spoon. Ingredients: Vinegar, Bicarb of soda, Morning fresh. Diagram:



Method: First you grab the bottle and tap in 6 tablespoons of Bicarb soda into the bottle. Then have half a cup of vinegar and pour it in. The cap should probably fly off with enough co2 Created. Hypothesis: The cap will fly off with enough co2 created. Conclusion: It failed because we either didn't put in enough vinegar or Bicarb, so basically, we didn't create enough co2.