Thermal Transfer

What type of energy transfer happens when you place food into the microwave to heat it up?

• Convection

• Conduction

• Radiation

Answer explanation

This type of energy transfer is radiation. The electromagnetic waves heat the food indirectly. No mass is needed to transfer the energy.

Tags

NGSS.MS-PS1-4

The transfer of energy through materials: solid, liquid, gas.

• Conduction

• Convection

• Radiation

Answer explanation

In order for conduction to happen, the materials must be in direct contact with the heat source.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The transfer of energy through the same materials. This only happens in liquids or gases.

• Conduction

• Convection

• Radiation

Answer explanation

Convection happens when fluids (liquids or gases) are heated up. The molecules move faster and spread out, making them less dense. The rise until the start to cool down. The molecules then slow down and stick close together, making them more dense. The cooler molecules sink and the cycle starts again.

Tags

NGSS.MS-ESS2-6

What type of energy transfer happens when energy is given off by the sun?

• Convection

• Conduction

• Radiation

Answer explanation

This type of energy transfer is radiation. There is no mass between the sun and the Earth that it heats. The electromagnetic waves carry the energy to Earth.

Tags

NGSS.MS-PS1-4

What type of energy transfer happens when you place ice on sprained ankle?

• Convection

• Conduction

• Radiation

Answer explanation

This type of energy transfer is conduction. The ice is place directly on the ankle, which is the heat source. The thermal energy moves from the body to the ice and melts the ice. The ankle feels cold because some thermal energy left to melt the ice.

What type of energy transfer happens when the great ocean conveyor belt moves Earth's water around the globe?

• Convection

• Conduction

• Radiation

Answer explanation

This type of energy transfer is convection. The sun heats up water at the equator and travels North in the Gulf Stream. It moves along Europe (the climate is warmer there because of the current) and becomes cold and sinks to the ocean floor. Then the water moves South and goes back down to the Equator to be warmed up again.

Tags

NGSS.MS-ESS2-6

heat always transfers from

• right to left

• left to right

• hot to cold

• cold to hot

Tags

NGSS.MS-PS1-4

If you pick up an ice cube, which direction will the heat flow?

• From the ice cube to your hand making your hand feel hot.

• From the ice cube to your hand making your hand feel cold.

• From your hand to the ice cube making your hand feel hot.

• From your hand to the ice cube making your hand feel cold

Tags

NGSS.MS-PS1-4

When Convection occurs in the atmosphere

• Cool air rises, warm air sinks

• warm air rises. cool air sinks

• warm air sinks, cool air sinks

• warm air rises, cool air sinks

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which of these is an example of radiation

• bacon on a heated skillet

• falling on a sidewalk

• sun heating up the sand

• putting a blanket on