CONDUCTION,CONVECTION AND RADIATION

What is the definition of CONVECTION

• When heat transfers through waves.
• 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.
• Heat traveling from the sun

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NGSS.MS-PS1-4

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

• conduction
• convection
• radiation

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Which is an example of conduction?

• Steam is rising from a cup of hot coffee.
• A hot biscuit is warming the plate it is on.
• The sun is shining through a window and warming a table.
• Grilling a hot dog over a campfire.

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NGSS.4-PS3-2

Radiation is when energy is transferred...

• by contact
• by flow of fluid in liquid or gas
• by waves or rays
• this is not an energy-transfer process

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What is the original source of most of the energy that people use?

• Energy that reaches Earth by radiation from the sun.
• Energy that reaches the earth by convection from the sun.
• Energy that reaches the earth by radiation from the core.
• Energy that reaches the earth by conduction from the core.

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Higher temperature means faster moving molecules

• True
• False

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which best describes heat transfer by radiation?

• a slice of bacon frying in a pan
• a pot on a stove boiling water
• a camp fire warming hands
• a hot air balloon

Which example below is an example of radiation?

• Standing on a hot metal bridge
• The attic is warmer than the basement
• The Sun heating the Earth
• Touching hot sand with your feet

Heat is the transfer

• of thermal energy from a cooler object to a warmer object

• of thermal object from a warmer object to a cooler object.

• Heat doesn't transfer

• Freezing to Cold

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NGSS.MS-PS1-4

NGSS.MS-PS3-5

The way the heat is moving from the hot coffee is called...

• convection
• radiation
• insulation
• conduction

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NGSS.MS-PS3-4