thinking critically pg 65

16 much discussion has focused the need to drive  more efficient cars and use less electricity if the law of convervation of energy is true why are people concerned is true why are people concernedabout energy usage

because if you take the energy and waste it on something useless then someone else would lack this energy

17 if heat flows in only one direction how can both hot and cold  liquids reach room temperature as they sit on a table 

the heat from  the hot object goes  in the air and the the now he her air goes to the cold liquid 

18 think about what happens to jack  and jill in the nursery rhyme what kinds of energy are used how was each energy form used 

are converting chemical energy their food into kinetic energy to walk as they rise kinetic energy is cover to thermal energy 

19 compare the three temperature scale you learned about how are they different how are they similar 

fahrenheit

Celsius 

kelvin

Fahrenheit  scale based on 32 f

the classic for freezin point 212 f

Celsius scale based on 0 c

based on water fro freezing point for boiling point 100 c

kelvin solid liquid gas 

20 use what you know about  the movement of thermal energy to explain why you would place minor burn on your arm under cool running water

burns can happen when the skin is exposed so cool runig water will cool off the area and relief

21 3 different types of energy 

gravitationel

potencial

elastic energy