Homework 9: Bringing the Heat

Objective 1:
1. Fahrenheit, Celsius, and Kelvin

2. Thermal energy is the kinetic energy of the movement of the molecules and atoms in an object. A change in thermal energy can be detected by a change in temperature. This is heat as well because heat is a relative term that changes meaning as put into a situation.

3. Specific heat is the rate at which an object heats. If an object has a high specific heat, like water, then it takes longer to heat up than an object with a low specific heat.

4. Ice cubes melt in your hand because when heat is transfered it is always from hot to cold. So, the energy in your body which causes heat transfers to the ice cube which causes it to melt.

5. There are two major reasons that some things get hotter more quickly than others and they are both realated. The first is that some things have a lower specific heat than other objects. The second is that some things conduct heat better than others and some are just insulators so they wont conduct the heat or energy. The conduction level of an object is one of the factors that help us to get the specific heat.

Objective 2:
1. Thermometers measure temperature with mercury. Mercury "shrinks" when the temperature is lower and "grows" when the temperature is higher.

2. Kelvin and Celsius are very similar in that the difference in their boiling point and freezing point is 100, they are both metric, and Americans don't care to use them very frequently. :) Fahrenheit is fairly different from the other two and Kelvin and Celsius are completely different other than those few simple similarities. One way that Fahrenheit is different from the others is that Americans love this scale!

3. 5º C = 41º F

4. 860º F = 460º C

5. 209,000 J

Objective 3:
1. conduction, convection, and radiation

2. Heat flows from a warmer object to a cooler object.

3. conductors: allow heat / energy to flow through
    insulators: trap heat / energy

4. A copper pipe would work better as a conductor because it is metal and metal allows energy to flow through it.

5. I would build a tent because the fabric is an insulator which would keep the heat in and keep me warm.

Objective 4:
1. When matter heats up its particles have more energy. So, when the particles have more energy the object changes its state.

2. particles speed up in movement

3.

4. heat transfer/ Heat always goes from a warmer object to a cooler object so it gives the energy to the cooler object which then melts.

5. The skin of a potato is an insulator and is fairly water resistent so, if you don't poke holes in it there is a possibility of it exploding.