Thermal Energy transfers

Thermal Energy

6.9A: Investigate methods of thermal energy transfer, including conduction, convection, and radiation

6.9B: Verify through investigation that thermal energy moves from warmer to cooler in a predictable pattern until all substances attain the same temperature such as an ice cube melting.

Multiple Choice

What is potential energy?

• Energy in motion

• Stored energy

• A throat punch

• Convection

Multiple Choice

What is kinetic energy?

• Stored energy

• A rock on a mountain

• Energy in motion

• Conduction

Multiple Choice

What is the Law of Conservation of energy?

• Energy is everywhere

• Energy is stored

• Energy is movement

• Energy can neither be created nor destroyed.

Multiple Choice

What is thermal energy?

• The energy that comes from heat

• The flow of thermal energy

• Renewable and nonrenewable

• Law of Conservation

Open Ended

Name three things that use thermal energy

Thermal energy

Thermal Energy → total kinetic energy of all the particles in an object; thermal energy of an object increases as temperature increases (faster particles move the more heat they generate)

Heat → thermal energy that flows from something at a higher temperature to something at a lower temperature

Open Ended

What are the three ways thermal energy can be transferred?

Thermal energy

• Conduction → Transfer of thermal energy by collisions between particles in matter.

• Radiation → Transfer of energy by electromagnetic waves. Occurs in gases only.

• Convection → Transfer of thermal energy in a fluid by the movement of warmer and cooler fluid from place to place. Occurs in liquids & gases.

Multiple Choice

The thermal energy transfer being shown in this image is...

• conduction

• radiation

• convection

Multiple Choice

Conduction requires

• Electricity

• the electromagnetic spectrum and particles

• air or water flow

• direct contact

Multiple Choice

Where do we see conduction in a pot of boiling water on the stove?

• The water heats up by touching the hot, metal pot.

• The steam from the hot water rises out of the pot.

• The heat from the fire can be felt on all sides.

Multiple Choice

The thermal energy transfer being shown in this image is...

• conduction

• radiation

• convection

Multiple Choice

What is the definition of CONDUCTION?

• When heat is transferred from objects like rays of light or electromagnetically.

• a hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

• When heat transfers from objects that are touching.

• When heat transfers through the heater or AC in your house.

Dropdown

Heat moves from ​ ​ ​

Select answer

Thermal Energy

All objects want to reach thermal equilibrium. Or, they want their temperatures to be equal.

In order to make this happen, heat will move from the hotter object to the colder object.

Heat will stop flowing once the two objects reach the same temperature, or are at thermal equilibrium.

Multiple Select

Which of the boxes shows the correct direction of heat transfer? Choose all that apply.

• A

• B

• C

• D

Multiple Choice

If you added ice (0^oC) to a glass of water (15^oC) how would the heat move between the ice & water?

• from the ice to the water

• from the water to the ice

Multiple Select

Which of the boxes in the image are at thermal equilibrium? Choose all that apply.

• A

• B

• C

• D

Let's Review