Conduction, Convection and Radiation

Question 1

What is conduction, convection and radiation used for?

Answer 1

Transferring heat from place to place.

Question 2

What is better at absorbing light energy? Dark, matt surfaces, or light, shiny surfaces?

Answer 2

Dark, matt surfaces.

Question 3

What is infrared radiation?

Answer 3

It is a type of electromagnetic radiation that involves waves and not particles.

Question 4

How is radiation different to conduction and convection?

Answer 4

Radiation can pass through the vacuum of space.

Question 5

What does the kinetic particle theory explain?

Answer 5

The properties of the different states of matters.

Question 6

What are the arrangement and movement of particles in a solid?

Answer 6

They are close together and in a regular pattern.

They vibrate about in a fixed position.

Question 7

What are the arrangement and movement of particles in a liquid?

Answer 7

They are close together and in a random pattern.

They move around each other.

Question 8

What are the arrangement and movement of particles in a gas?

Answer 8

They are far apart and in a random pattern.

They move quickly in any direction.

Question 9

What are the properties of a solid and why are they like this?

Answer 9

They have a fixed shape and cannot flow. They are like this because the particles cannot move from place to place.
They cannot be compressed or squashed. They are like this because the particles are close together and have no space to move into.

Question 10

What are the properties of a liquid and why are they like this?

Answer 10

The flow into the shape of their container. They are like this because the particles can move around each other.
They cannot be compressed or squashed. They are like this because the particles are close together and have no space to move into.

Question 11

What are the properties of a gas and why are they like this?

Answer 11

They flow and completely fill their container. They are like this because the particles can move quickly in all directions.
They can be compressed or squashed. They are like this because the particles are far apart and have space to move into.

Question 12

How can heat energy move through a substance?

Answer 12

Conduction

Question 13

What type of metals are good conductors of heat? Metals or non-metals?

Answer 13

Metals.

Question 14

What are insulators?

Answer 14

Poor conductors of heat.

Question 15

How is heat energy transferred from a hot place to a cooler place?

Answer 15

Convection

Question 16

When does convection occur?

Answer 16

the surface area of the liquid is When particles with a lot of heat energy in a liquid or gas move and take the place of particles with less heat energy.

Question 17

Why do liquids and gases expand when they are heated?

Answer 17

The particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume. This is because the gap between particles widens, while the particles themselves stay the same size.

Question 18

What is evaporation?

Answer 18

Evaporation involves a liquid changing into a gas.

Question 19

What is condensation?

Answer 19

Condensation involves a gas changing into a liquid.

Question 20

When does the rate of condensation increase?

Answer 20

If the temperature of the gas is decreased.

Question 21

When does the rate of evaporation increase?

Answer 21

If the temperature of the liquid is increased. It is also affected if the surface area of the liquid is increased and if air is moving over the surface of the liquid.

Question 22

What affects the rate at which an object transfers energy by heating?

Answer 22

The difference in temperature between an object and it’s surroundings.
The surface area and volume of the object.
The material used to make the object.
Nature of the surface that the object is touching.