Chapter 14 - Heat

Question 1

3 types of heat transfer

Answer 1

conduction, convection, and radiation

Question 2

Earth loses the most heat by which type of heat transfer?

Answer 2

Radiation

Question 3

Name the 7 wavelengths on the electromagnetic spectrum from longest to shortest

Answer 3

1) Radiowaves
2) Microwaves
3) Infrared radiation
4) Visible light
5) Ultraviolet radiation
6) X-rays
7) Gamma rays

Question 4

Heat Capacity

Answer 4

An object’s capacity for storing internal energy

Question 5

Explain how a greenhouse works

Answer 5

1) Visible light rays pass through the glass
2) Objects inside absorb them and give off heat by radiation
3) The radiation waves cannot pass back out through the glass, so they build up and bounce around in the greenhouse, making it hotter and hotter.

Question 6

Characteristics of an object with low specific heat? High specific heat?

Answer 6

Objects with low specific heat will heat up quickly and cool down quickly.

Objects with high specific heat will take a long time to heat up, and a long time to cool down.

Question 7

Heat

Answer 7

Energy in transit from a substance with higher temperature to one with lower temperature

Question 8

Define calorie

Answer 8

The amount of heat required to change the temp of 1 gram of water by 1*C.

Question 9

Specific Heat

Answer 9

The amount of heat required to raise the temperature of a certain amount of a substance by a certain number of degrees.

Question 10

Conduction

Answer 10

• Transfer of heat between 2 solid objects that are
  touching each other
• Due to collisions between atoms where heat is
  exchanged

Question 11

Convection

Answer 11

• Fluid currents that carry heat from one place to
  another
• The material itself moves from one place to
  another

Question 12

Radiation

Answer 12

• Electromagnetic waves that travel at the speed of
  light
• When an object absorbs energy, it gives off
  radiation energy, and we see color