Hot objects begin to cool as-

thermal energy in the object is transferred to the surrounding air.

cooler air is transferred to the hot object.

atoms in the object react with the oxygen in the air.

thermal energy in the object cancels out energy in the air

Insulation is used in the walls of a building to ____.

keep thermal energy from moving through the walls

keep cold air from moving through the walls

Why do you want to live in a home with good insulation during the cold winter months?

If there is good insulation, the thermal energy will not be able to move easily from inside the warm home to the cool areas outside the building.

The insulation will keep you cool during winter.

If there is not good insulation, the air inside the home will become too hot.

A house with good insulation will keep the warm air in the attic.

When a popsicle melts, the particles _____.

gain thermal energy and speed up

there are no particles in popsicles

lose thermal energy and slow down

What is an insulator?

Something that does NOT absorb heat very well.

Explain the difference between conduction and convection.

Heat rises for convection and travels thru liquids and gases. Conduction travels thru solids and liquids but must be touching.

Conduction involves heat going in all directions while heat rises with convection.

Heat moves in all directions for convection, but it rises for conduction.

Thermal energy travels thru solids for both conduction and convection; however, conduction involves direct contact.

Identify and explain the different types of heat transfer (convection, conduction, radiation) occurring in the following scenario. Chris went on a camping trip. During the day it was so hot that he got sunburn. When it was time to go to his campsite, he noticed smoke in the air. His father had started a fire and he felt the heat as he walked by. In the morning while his mother was cooking breakfast he accidentally touched a hot pan and got burned. Although this was the case he still had a lot of fun on the trip.

Sunburn = radiation; Smoke rising = convection; Feeling fire = radiation; Touching hot pan = conduction

Sunburn = radiation; Smoke rising = convection; Feeling fire = radiation; Touching hot pan = convection

Sunburn = radiation; Smoke rising = conduction; Feeling fire = radiation; Touching hot pan = conduction

What is thermal energy

The total amount of energy from the movement of particles in matter

Pans A & B shown above have been on a hot stove for 10 minutes. Pan A has a metal handle and pan B has a plastic-coated handle. Which handle would be hotter?___________ Why?_________________

Pan A because the metal is a conductor of heat.

Pan B because there is an insulator on the pan.

Pan A because there metal is an insulator.

Pan B because the metal conducts heat.

Which sentence explains why a cold metal spoon placed in a pot of boiling water becomes hot?

Thermal energy is transferred from the water to the spoon.

Thermal energy is transferred from the spoon to the water.

Thermal energy in the water is transformed into kinetic energy in the spoon.

Thermal energy in the spoon is transformed into kinetic energy in the water.

An ice cube feels cold in your hand because:

heat flows from your hand to the ice cube

cold flows from the ice cube to your hand

there is friction between your hand and the ice cube

If you place a cold cup of water in the direct sunlight on a hot day, what change will take place in the thermal energy of the particles that make up the water?

The solar energy will cause the water to warm up. This will cause the particles of water to change from moving very slowly-less thermal energy (when cold) to moving quickly as they gain thermal energy (warm up).

The particles will remain the same.

The solar energy will cause the particles will slow down because the sun will make the water warmer.

The particles will become smaller when the sun's energy heats the water up.

Temperature, Thermal Energy

Authored by Charles Martinez

Physics

8th Grade - University

NGSS covered

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MULTIPLE CHOICE QUESTION

3 mins • 1 pt

The amount of heat required to raise the temperature of one gram of a substance by one degree Celsius is ________

Heat energy

Specific heat

convection

thermal energy

Tags

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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.

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the definition of CONVECTION

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

When heat transfers from objects that are touching.

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

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the definition of RADIATION

Hot liquid or air that expands, becomes less dense, and rises or becomes more dense, and sinks.

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

When heat transfers from objects that are touching.

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

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many kinds of heat transfer are there?

4 or more

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This is an example of-

Conduction

Convection

Radiation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

This is an example of-

Conduction

Convection

Radiation

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

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