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

Heat transfers from an area of ____temperature to an area of ___ temperature.

• high to low
• low to high
• high to high
• It can travel high to low and low to high. 

Which of the following is not a method for heat transfer

• Radiation

• Insulation

• Conduction

• Convection

In which of the following state are the particles closest together?

• Fluid

• Gas

• Liquid

• Solid

How does heat energy reach the Earth from the Sun

• Convection

• Radiation

• Conduction

• Insulation

Which of the following is needed for convection to happen?

• Fluid/s
• Light in the form or rays
• Electromagnetic waves
• Fire

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.

How many kinds of heat transfer are there?

• 1
• 2
• 3
• 4 or more

The transfer of heat by currents through liquids of gases is called

• Perspiration
• Radiation
• Conduction
• Convection

Radiation= 

• physical contact
• warm air rising
• heat moving through empty space
• say what?