Pressure+problems

7G What a waste

Explain what causes gas pressure. Describe how the pressure of a gas can be changed. Explain a change in gas pressure in terms of particles. Give some examples of the effects of air pressure.
 * Objectives (what you will learn this lesson) **


 * Starter **
 * Review completed work
 * Key term quiz

> media type="file" key="ES7_Ge100_03ani.swf" width="640" height="480" > media type="file" key="ES7_Ge100_06ani.swf" width="640" height="480" > media type="file" key="ES7_Ge101_04ani.swf" width="640" height="480" > a. Describe the demonstration > b. Write a sentence or two to explain why the can collapses
 * Activities **
 * 1) Watch the collapsing can demonstration. Later on in the lesson you may be able to explain why the can collapses.
 * 2) Learn about what causes gas pressure
 * 1) Learn about what causes pressure inside balloons
 * 1) Watch the class demonstration and the animation about the Magdeburg hemispheres
 * 1) Have a quick play with the KScience [|animation on gas pressure] to see how pressure in a container can be changed.
 * 2) Complete Q2, 5, 6 (Exploring Science 7, p100-1)
 * 3) Look again at the collapsing can demonstration. In your book:
 * 1) Complete the worksheet on [|Gas pressure]
 * 2) Extension: Read and answer questions on [|Galileo's experiment on pressure]


 * Summary **
 * Review completed classwork / key term quiz
 * Complete the [|Crossword on particle theory]. Self-mark and compare your answers to those of your classmates.

Complete the gapfill on [|Pressure problems]. Either copy and complete in your exercise book or print it off when you are done.
 * Homework **