Transfer Of Thermal Energy

Question 1

Name the 3 processes that help heat to be transferred

Answer 1

Conduction

Convection

Radiation

Question 2

Define thermal conduction

Answer 2

It is the transfer of heat

through matter

from a region of higher temp to a region of lower temp

without the particles of matter changing their position

Question 3

Name uses of good thermal conductors

Answer 3

Copper in saucepan

Heaters

Radiators

Question 4

Name uses of bad conductors

Answer 4

Warm clothing

Wooden or plastic handles of pots and pans

Insulators in roofs and around hot water cilinders

Question 5

Define convection

Answer 5

Is the distribution of heat throughout a fluid

from a region of high temp to a region of low temp

by movement of the part of fluid which is heated or cooled

Question 6

Def radiation

Answer 6

Is the flow of heat

from a source to another

by means of electromagnetic waves

Question 7

When radiated heat falls on an object it can (3)

Answer 7

Partly transmitted

Partly reflected

Partly absorbe

Question 8

Def Heat

Answer 8

Heat is energy in transit from one object of higher temp to an object of lower temp