Heat
description
Transcript of Heat
Heat
Heat• A form of energy• The motion of particles in matter• Flows from warmer objects to cooler ones
Did you Know
HEAT CAN DO WORK
Steam Engines
Automobiles
Solar Energy
A Toaster
Rubbing your hands together produces heat.
What produces heat energy?
Nuclear reactionsIn the sun
The earth’s most important heat source
(The energy of motion)
-Rubbing your hands together
-Striking a match
Mechanical Energy
Sometimes heat is released when substances react chemically with each other.
Chemical Energy
Electricity
What other appliances can you name that change electricity into heat energy?
Temperature
A measure of how fast an object’s particles are moving.
Touching an object is not the safest or most accurate way to measure its temperature.
Use a thermometer to measure temperature accurately.
Freezing point- The temperature at which a liquid changes to a solid.
Water= 0 degrees Celsius32 degrees Fahrenheit
Melting Point- The temperature at which a solid changes into a liquid.
Same as freezing point, but used when an object is being heated.
Boiling point- Temperature at which a substance changes from a liquid to a gas.
Water= 100 degrees Celsius
212 degrees Fahrenheit
Every substance has its ownFreezing and boiling points
How does heatTravel?
RadiationThe movement of energy through space.
Conduction- The movement of heat energy from one molecule to the next.
Convection- Flow of energy that occurs when a warm liquid or gas rises.
Heat makes things rise!