Understanding Heat Energy TransferLesson Objective: WILF is for you to be able to explain how heat

energy is transferred.

19 April 2023

Keywords

Starter:-1. What material is a good conductor of

heat?2. What materials are good insulators?3. Why is it important to think about

insulators?

Heat TransferHeat always moves from a warmer

place to a cooler place.

True or False• If you put a hot object in a cooler room,

it will cool to room temperature.

• If you put a cold object in a warmer room will heat up to room temperature.

There are 3 ways heat energy is transferred. One of them is:-

Lesson Objective: WILF is for you to be able to explain how heat energy is transferred

1.Convection2.3.

In your book, complete a drawing and these sentences

1. Draw the experiment here and label the equipment. Use arrows to show the heat transfer

2. Describe in your own words what you say happen.

_____________________________

3. Try to explain why Heat energy is transferred __________

__________________________________________________________

Keywords:

Register continuum

L.O:-. WILF is for you to be able to explain how heat energy is transferred.

Spoken

Everyday language

Written

Formal language

05/ 12/ 2003

ConvectionConvectionConvection is all about when a gas or liquid (“fluid”) moves andcarries heat with it. When the fluid is heated it ____________ . This means that it will become less __________ than the colder fluid around it. Because of this the warmer fluid will try to “_______” over the colder fluid, and this is why warm air rises. This is called a convection ___________ . This is how heat reaches us f rom the ___________ in this room.

Words to use: expands, radiators, dense, heated, current, float

Water movement

Hot water rises

Cooler water sinks

Convection current

Cools at the surface

Why is it windy at the seaside?

Cold air sinks

Where is the freezer

compartment put in a fridge?

Freezer compartmen

t

It is put at the top, because cool air sinks, so it cools the food on the way down.

It is warmer at the

bottom, so this warmer

air rises and a

convection current is

set up.

1. In which of the following are the particles closest together?

A. Solid

B. Liquid

C. Gas

D. Fluid

4. Which is the best surface for reflecting heat radiation?

A. Shiny white

B. Dull white

C. Shiny black

D. Dull black

Convection Plenary questionsUsing the following keywords answer the questions. I will be asking 2 students to come up and answer them in front of the class and talk like a scientist.

2. Why are boilers placed beneath hot water tanks in people’s homes? Hot water rises.

So when the boiler heats the water, and the hot water rises, the water tank is filled with hot water.

1. Why does hot air rise and cold air sink?

Cool air is more dense than warm air, so the cool air ‘falls through’ the warm air.

Keywords

Dense

Warm air

Falls

Rise

Sink

Cold air