Heat Transfer

Question 1

Radiation

Answer 1

The transfer of energy through space. It takes place with no direct contact between the heat source and the object

Question 2

Conduction

Answer 2

Heat transfer within a material or between materials that are touching

Question 3

What is an example of conduction. Explain

Answer 3

A metal spoon in a boiling pot and when you touch it the heat is transferring from the burner/stove top to the water to the metal spoon to your hand.(This only an example there are many more ways to show conduction

Question 4

What is an example of convection. With example

Answer 4

A lava lamp or a pot boiling (but in this case I will be describing the lava lamp) the light bulb the heat source is warming the oil particles which are more dense at the bottom the particles are warming up and moving faster and farther away from each other. The are becoming less dense and starting to rise slowly the particles are rising and becoming cooler once they reach the top of the lava lamp they cool off and slowly become more dense and get more dense as they go back to where they started (the heat source) and the cycle continues over and over again till you remove the heat source or in this case turn off the lightbulb

Question 5

What is an example of radiation. Explain.

Answer 5

The sun warming the earth. The sun is your heat source and it is warming the earth through space, because the two objects are not touching. Other examples include roasting a marshmallow, or getting warm by a heater.

Question 6

What are convection currents

Answer 6

The flow that transfers heat within a fluid

Question 7

What are the 3 main factors that set convection currents in action?

Answer 7

1. Change in density
2. Gravity
3. Heat source

Question 8

True/False the transfer of energy through empty space is called convection

Answer 8

False

Question 9

True/False The movement of energy from a warmer object to a cooler object is called heat transfer

Answer 9

True

Question 10

True/False Conduction is heat transfer by direct contact of particles of matter

Answer 10

True

Question 11

True/False Radiation is the transfer of heat by the movement of a heated fluid

Answer 11

False

Question 12

True/False Density is a measure of how much heat there is in a volume of a substance

Answer 12

False

Question 13

What heat source causes convection the mantle?

Answer 13

Lower Mantle and Core

Question 14

Convection

Answer 14

Heat transfer by the movement of currents within a fluid