Atomic Theory

“All things are made up of atoms.”

States of matter

Solid, liquid, gas, and plasma

State of Solids

  • Has definite shape and volume
  • High density and not very compressible
  • Does not depend on the shape of the container (doesn’t fill it in)

State of Liquids

  • Has a fixed volume
  • Takes the shape of container
  • Less dense than solids
  • Almost incompressible

State of Gases

  • Takes the shape of the container
  • Takes the volume of container (this means that the gas molecules can be spread out evenly in the container or compressed in a smaller container. The volume is when the molecules are evenly distributed.)
  • Can be compressed
  • Gases are in the gaseous state at room temperature
  • Gases have more energy than liquids, and solids.
  • Gases are less dense.

State of Plasma

Plasma is simply an ionized gas, where the gas is charged with free electrons and positive ions because of the amount of energy plasma contains.


Unit 1.6 – Conceptual Questions

Question 1: Why do you feel cold after getting out of the shower? What is causing the cold sensation?

Question 2: Which thermometer would have a more of a temperature drop: a fan blowing at a a thermometer with a damp towel wrapped around it, or a thermometer with a dry towel? Why?

Question 3: Why do farmers in Florida spray their crops during a cold spell? Why do the farmers want the crops to slightly freeze?

Question 4: How can you boil water with ice? What parameters do you need in order to do that?

Question 5: What happens to the boiling point when you boil water in areas of high altitudes?

Question 6:  What happens when fuels with high vapour pressure is left out in areas of high altitudes?