The transfer of heat by electromagnetic waves
Radiation
When asked what type of heat transfer is associated with a campfire, a student said, "A burning campfire is an example of convection. The fire heats the air causing the warm air to rise and the cool air to sink." Is this right or wrong? Explain.
False! Warm air DOES rise and cold air DOES sink, but a campfire is an example of radiation.
As particles warm up, they ______ and move ______.
spread out
faster
The heat transfers from my feet to the cold tile floor.
Student A: rubber band, metal fork, paper
Student B: nail, wood block, paper clip
Student C: cork, bar of soap, piece of tape
Student D: nail, metal hook, paper clip
Student D
A substance that does not readily conduct heat
Insulator
When a fan circulates air within the room, what type of heat transfer is demonstrated?
Convection
As particles cool down, they ______ and move __________.
Get closer together
Slower
I want to make sure Atlas stays cool when we are outside and playing this summer! Should I buy him swimwear that is dark green or aqua blue? Explain your thinking!
It is a lighter color. Darker colors absorb heat faster and retain heat longer.
What is heat?
A measure of the amount of thermal energy transferred from one object to another.
A material that transfers heat efficiently
Conductor
What type(s) of heat transfer are present in this photo?

Conduction: the pan is touching the stove.
Convection: the water is boiling in the pan.
Radiation: Thermal energy is radiating from the pot.
Heat always transfers from ________ to _______ until ______________.
Hot
Cold
The objects are the SAME temperature
In a thermometer, the mercury (the red liquid) rises as the temperature increases. Why does this happen?
Materials expand as they get warmer.
A measure of the average kinetic energy of particles in matter.
The direct transfer of heat from one object to another when they are in contact
Conduction
When actors perform on stage, they often get warm from the bright lights. What type of heat transfer might explain this?
Radiation
When objects warm up, they ___________. When they cool down, they __________. (The exception to this is water; it works the opposite way!)
Expand
Contract
You're baking a cake for a special event, and you're in a rush. Without increasing the temperature of the oven, how can you get the cake to finish baking faster?
Use a dark-colored pan instead of a clear glass pan.
You got hit in the arm with a ball at practice, and your arm starts to swell. The coach advises you to put ice on it. Explain why the ice will eventually melt.
Heat transfers from the warmer object (your arm) to the colder object (the ice) until they are the same temperature. When the ice is the same temperature as your body, it has to be melted.
The transfer of thermal energy from a warmer object to a cooler one
Heat
Your mom pours creamer (from the fridge) into her hot cup of coffee. What type of heat transfer is taking place?
Convection
As an object heats up, it gains ____________.
Thermal energy
What might happen if a bridge was built without expansion joints?
In the summer, the materials would expand, and the bridge would crack.
When it snowed this winter, many of you played in the snow. If you didn't wear gloves, why did your hands get cold when you made a snowball?
The heat from your hands is transferred to the snowball.