HEAT and HEAT TRANSFER QUIZ

What temperature does water freeze on the Celsius scale?

• 100

• 212

• 32

• 0

What is an insulator?

• Something that DOES NOT absorb heat very well.

• Something that DOES absorb heat very well

Why does cool air sink?

• Hot air and cool air have the same density.

• Hot air is more dense than cool air.

• Cool air is more dense than hot air.

When does CONDUCTION happen?

• when heat is transferred through empty space as electromagnetic waves
• when a  fluid (gas or liquid)  expands, becomes less dense, and rises or cools, becomes more dense, and sinks.
• When heat transfers between objects that are touching.

When does CONVECTION happen?

• when heat is transferred through empty space as electromagnetic waves
• when a  fluid (gas or liquid)  expands, becomes less dense, and rises or cools, becomes more dense, and sinks.
• When heat transfers between objects that are touching.

What does RADIATION happen?

• when heat is transferred through empty space as electromagnetic waves
• when a  fluid (gas or liquid)  expands, becomes less dense, and rises or cools, becomes more dense, and sinks.
• When heat transfers between objects that are touching.

You're holding hands with your best friend.  Your friend's hands are REALLY warm and yours are really cold.  After a few minutes, your hand has warmed up.  How might you explain what happened?

• The cold energy from your hand transferred to your friend's hand through conduction.
• The heat energy from your friend's hand transferred to your hand through conduction. 
• The cold energy from your hand transferred to your friend's hand through convection.
• The heat energy from your friend's hand transferred to your hand through convection.

A large block of ice has thermal energy.

• True

• False

Heat and temperature are the same thing.

• True

• False

Heat passes from...

• higher material to lower material

• cooler material to warmer material

• warmer material to cooler material

• heat cannot be passed