Effect of Heat.

This blog post is to show all the knowledge our class has learned over the past few weeks in chemistry.

Contraction (Imploding Can)                                                                                          A couple of weeks ago we experimented to teach us about contraction, contraction is when something and something contracts (becomes smaller). When we did the experiment we lit the Bunsen burner, once we lit the Bunsen burner, the heat of the flame made the water slowly turn into steam. Once the water finally started to turn to steam we picked up the tongs and flipped the can into an ice cream container full of cold water. Unfortunately, our experiment didn't work and it failed. What's supposed to happen is when you flip the can into the ice cream container the can is supposed to contract and become smaller from the warm and cold particles moving around quickly.

Expansion (Ball and hoop)                                                                                               Expansion is when something becomes more extensive. We did an experiment to learn about expansion we started up a Bunsen burner and put the ball over the flame. As the flame heated the ball it caused it to expand making it not fit through the hoop as it did before.

Conduction (Dropping Pins)

Conduction is the process when heat energy is transmitted through a solid, making the particles vibrate more and more. The experiment we did the learn about conduction is where you set up a Bunsen burner and put a metal rod on a clip (with 5 pins covered in Vaseline stuck to the rod). After that, you put the Bunsen burner under the end of the rod then wait. Eventually, the pins should fall off one by one because the particles in the rod starting to vibrate (caused by the flame of the Bunsen burner.

Convection in liquid (pomegranate crystals in water)

Convection occurs when particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy. When experimenting to learn about convection in liquid we lit a Bunsen burner and placed a glass beaker on top of the stand. When we were ready we dropped a pomegranate crystal into the water through a straw. The heat from the flame made the color of the dissolving crystal circulate until fully dissolved into the water.

Convection in gas (Teabag rockets)

Convection in gas is the transfer of heat by the movement of gas between areas of different temperatures. To teach our class what convection in gas was we experimented with teabags and fire. Firstly we tipped the tea out of the teabag then we stoop the tea bag up straight. Once that was done we were given a box of matches to light the top of our teabag. As the fire spread to the bottom the teabag floated up to the ceiling, spreading ashes all through the room.