1. Homework for 2/8/2007 H4: Describe the transformation of energy in a hydroelectric plant – see handout. Include every part of the process from water at the top of the dam to electricity in your home. Use the terms on the back of your sheet (they are also on the third slide of this powerpoint. Rusty nails – see handout Quiz on 2/8/2007 Read Ch 3 and 13. We will continue Ch 13 next time.

2. Energy and Matter Net Force – agent of change, producer of motion. Energy - measure of change. Energy is conserved. Mass is conserved. Mass/Energy is conserved. Energy and Mass are different manifestations of the same underlying quantity.

4. Energy: Transformation

5. Matter: Three States p. 277 of your text: “Matter can be in any of three states – solid, liquid, or gas.” Which statement is correct? A.There only three states of matter. B.There are really four states of matter. C.There are many more than three states of matter.

6. Stainless vs. Amorphous

7. Matter: Pressure The weight of the column of air above you on your reclining body is around A. 6000 pounds. B. 600 pounds. C. 60 pounds. D. 6 pounds.

8. Matter: Pressure The force on your body because of atmospheric pressure from the column of air above you when you are lying down is around 3 tons (6,000 pounds). I was told the interior of the tank car was washed out and cleaned with steam. Then all the outlet valves were shut and the tank car was sealed. All the workers went home for the evening and when they returned, this is what they found. Apparently as the tank car cooled, it collapsed. The shell on these tank cars is 7/16th's thick steel. It is hard to imagine the forces it took to do this much damage, to such a large steel object.