Heat and It's Properties Flashcards
Matter is made up of small particles called ______.
Molecules
When molecules are heated they move _______.
More rapidly / very fast
When molecules are heated they move _______.
More rapidly / very fast
Heat from the _______ warms the _______. In turn, the land warms the ________.
- Sun
- Land
- Atmosphere
It is the method of heat transfer through particles from one part of a substance to the parts next to it.
Conduction
Conduction comes from the latin word meaning ______.
“to lead”
In this method, heat seems to be led along from place to place
Conduction
(method) When one part of the material is heated, the particles in this part move fast and bump into the particles next to them.
Conduction
(method) Is the transfer of heat by means of moving currents of liquids or gases.
Convection
(method) Is the transfer of energy in the form of waves.
Radiation
Three things may happen when radiant energy hits or strikes a material:
a. Radiant energy may pass right through the material.
b. Radiant energy may be reflected.
c. Radiant energy may be absorbed and changed into heat.
Materials that are good absorbers of radiant energy.
dull dark surfaces
Materials that are poor absorbers of radiant energy.
light shiny surfaces
(true or false) Materials have different temperatures.
TRUE
Materials that do not allow heat to flow easily.
nonconductors
Nonconductors that are used to halt the flow of heat.
Insulators
Materials that allow heat to flow easily.
conductors
Heat can be transferred by:
- conduction
- convection
- radiation
Heat transfer flows in what direction?
from a warmer object to the cooler one.
(true or false) In radiation, no particles are needed to transfer.
TRUE
(true or false) In radiation, particles are needed to transfer.
FALSE
Energy that comes directly from the Sun.
Solar energy
Materials designed to collect solar radiation from the Sun and convert energy to electricity.
Solar panels
People who are trained to design or make solar panels.
solar energy contractors
The buildup of carbon dioxide in the atmosphere that causes increase of atmospheric temperature.
global warming
The measure of how hot or cold something is called ___________.
a. density
b. temperature
c. volume
d. solid
b. temperature
The energy of the random motion of particles in matter is called ________.
a. Thermal energy
b. Kinetic energy
c. Solar energy
d. Conduction
b. Kinetic energy
Energy from the Sun reaches Earth by __________.
a. friction
b. convection
c. reflection
d. radiation
d. radiation
This is a material that does NOT allow heat to pass.
a. thermal energy
b. insulator
c. conductor
d. conduction
b. insulator
Heat is transferred through the water by ______.
convection
Heat is transferred from the flame to the pot by ______.
conduction
