Chemistry

 Hi there, today I will be talking about what we did for the past 4 weeks in chemistry.

For the past 4 weeks we have been learning about conduction, convection, contraction and expansion. What we did for the expansion one was about the ball and how you heat up the ball and put it in cold water so it won't fit through the hole anymore.

The meaning of contraction is the process of becoming smaller or shorter, what we did for the contraction was about the imploding can. What happened was we heated up the can with water in it for a few minutes and after that we started to fill up the ice cream container with cold water but only half way. After the can started to steam, we flipped the can quickly to the cold water so that it will get crushed up.

Conduction is a heat travelling through a solid making the particles vibrate more and more. For conduction we did an experiment about the pins and how we stick them up the metal using the Vaseline and after we have done putting it on the metal we started to heat up the tip of the metal so that it will travel through the metal and pins will start to fall down on the metal because the Vaseline melted.

Convection is when heat travels through a liquid or gas, expansion is the act of getting
bigger or something added onto something else. For convection we did this
experiment about the crystal, and for this experiment we started to heat up the water
and put in the crystal to the water. After that we were watching the crystal as it rose up
through the water and it started to travel around back from the top.

We also learnt about how heat affects particles, and when particles are heated up they move even faster. Solid will vibrate more, and liquids and gases will move a lot more quickly. We have done a lot of different experiments about heat so that we were able to see what heat does in different kinds of experiments that we are doing.

There was another experiment that we have done and that was all about the tea bags. We started by taking all the powder out from the tea bag so that all we had left was the piece of paper. After we have empty the tea bag out, we cut off the top of the piece of paper bag so that it will be able to stand up and not fall once we light it up. What was supposed to happen was once it got lit up by the fire on the top of the tea bag, it was supposed to fly up because since the tea bag is so light it will be able to fly.