C.8 Heat Transfers by Convection and Radiation

Question 1

What is Convection.

Answer 1

Heat is transferred when liquid or gas PARTICLES MOVE from one area to another.

Question 1

What is Convection Currents

Answer 1

The particles in a liquid or gas move in a circular patterns when heated.

Question 2

What is Radiation?

Answer 2

Radiation is the transfer of energy by invisible waves that can travel great distances.

Question 3

What is radiant energy?

Answer 3

Energy transferred from it’s source by radiation.

Question 4

Why can’t convection occur in solids?

Answer 4

The particles in a solids can not move with the same freedom liquid and gas can.

Question 5

Why do liquid and gas particles move in a circular pattern when heated?

Answer 5

Heated particles rise (less dense), then cool off and sink (become more dense).

Question 6

What happens to the particles when radiant energy comes in contact with them?

Answer 6

Particles increase their kinetic energy (move around more).