Objective 2

1.  Thermometers measure temperature by using a substance called mercury (the red stuff inside the tube) because it expands when it's hot and decreases when it's cold
http://wiki.answers.com/Q/How_do_thermometers_measure_temperature

2.  The three temperature scales are different because in faranheit, water boils at 212 degrees faranheit and freezes at 32 degrees, in kelvin, water boils at 373 kelvin and freezes at 273 kelvin, but in celsius water boils at 100 degrees C, and freezes at 0 degrees C

3.  5 degrees celsius x 9/5 + 32= Farneheit , so 5 x 9/5= 9 + 32= 41 degrees faranheit

4.  860 degrees faranheit x 5/9 - 32= Celsius, so 860 x 5/9=477.777 - 32 = 445.777

5.  5,000 kelvin