Ricky+M+&+M








 * Gas:** particals in gas deffuse fast and mostly come from liquids that have been heated beoyend boiling point. gas particals travel very fast and have no bonds so can go where ever they want
 * Liquid:** particals will take the shape of what the container is. bonds between the particals are weak. particals roll over each other but bonds will stay and hold them together. particals move at a medium pace
 * soild:** particals have their on shape. particals vibrate but don't move. bonds are strong and hold it together and make it soild.

1. What is sublimation? Sublimation is when the solid turns strait into a gas. The solid skips the stage of a liquid and goes to a gas. E.g. dry ice
 * __questions__**

2. supposing you increased the pressure of the air above the boiling liquid. what would happen to the boiling point of the water? When you go higher up the air pressure becomes less because there is less air above you. Because of less air pressure the heat can rise faster and the water vapour can expand faster therefore make the boiling point of water less.

3.imagine that you are tring to boil water for a cup of tea up a moutain. why would the cup of tea be fairly horrible? it would be horrible because first you wouldn't know what tempture to boil it and how hot boiling point is. it will either become cold or when you have taken it of the boiler to much of it will have evaporated.

4.does water contract or expand on changing form a liquid to a soild? water expaneds because of the little air moilcules in it and all the moilicules a line to make a soiled.

1. Why do icebergs float in Antarctic and arctic waters? Do you think there is much of the iceberg under water or is it mostly above the water? How could you test your hypothesis? I think that icebergs float because of the little pockets of air in the ice and that it displaces enough water to make it float. I know that only 1/3 of an ice berg is shown above the water. You can test this by putting some ice into a beaker of cold water.

2. When you have a jar with a very tight lid, you can run it under hot water and it becomes easier to open. Why? When you run it under hot water the lid expands slightly releasing its grip on the container

__**Colloids**__ A Foam colloid is gas in liquid for and example: shaving cream and whipped cream