Thermal Energy and Temperature

As you touch a hot stove the heat transfers -

• from your hand to the stove
• from the stove to your hand
• It doesn't transfer

Why does a metal lawn chair get hot in the sun when the grass sitting in the same sunlight remains cool to the touch?

• Heat travels easily through plants but not metals.
• Heat travels easily through both plants and metals.
• Heat travels easily through metal objects but not through plants.

What is the difference between a conductor and an insulator?

• An insulator allows energy to flow through it easily

• A conductor allows energy to flow through it easily and an insulator does not

• An insulator is magnetic and a conductor is not
• A conductor is magnetic and an insulator is not

Hannah noticed that when she heats a pot of soup on the stove, the soup moves in a circular motion. What type of heat transfer is occurring?

• The transfer of energy by electromagnetic waves.

• A circular motion of air that causes wind and changes in weather

• A type of heat transfer that occurs through the movement of fluids.

• The transfer of energy from one particle of matter to another within an object or between two objects that are in direct contact.

What is the transfer of heat by direct contact?

• Convection
• Electromagnetic waves
• Radiation
• Conduction

How does radiation differ from conduction and convection in terms of heat transfer?

• Radiation is slower than conduction and convection.

• Radiation only occurs in solids.

• Radiation requires a medium to transfer heat.

• Radiation does not require a medium to transfer heat.

The transfer of thermal energy from a hotter area to a colder area.

• liquid

• heat

• kinetic energy

• water vapor

Warm air rises and the cool air sinks demonstrates this type of heat transfer. 

• conduction
• convection
• radiation
• Insolation 

Convection

• The transfer of energy by electromagnetic waves.

• A circular motion of air that causes wind and changes in weather

• A type of heat transfer that occurs through the movement of fluids.

• The transfer of energy from one particle of matter to another within an object or between two objects that are in direct contact.

Walking on the warm sand sand with your bare feet demonstrates this type of heat transfer. 

• conduction
• convection
• radiation