CHEMISTRY BLOG
For the last 4 weeks, we have been doing different experiments involving contraction, expansion, conduction, convection in liquid, and convection in gas. All these experiments all related to what we have learned about.
Contraction: Something that combines with another substance reduces in size/gets smaller, this relates to our experiment called imploding can. The reason for this is because when we heated up the water inside the can using the bunsen burner and then quickly tipped the can upside down into cold water, the can immediately imploded because the cold and hot water contracted together which made the can implode.
Expansion: This would be the opposite of contraction, expansion is when instead of decreasing the size increases.
Conduction: A process in which either heat or electricity travels through a substance with a difference in temperature.
Convection in liquid: The speed of heat travelling through opposite substances. Using hot water (not boiling) in a beaker we slowly added in the permanganate crystal thoroughly expanding the colour fastly through the water.
Convection in gas: When particles with a lot of heat energy replace less heated particles, the hot particles/areas rise into the cold areas because it is a lot denser than the cold areas.
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