PowerPoint Thermal Insulators and Conductors

8/10/2019 PowerPoint Thermal Insulators and Conductors

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What size is your carbon footprint?

Thermal Insulators and Conductors

In this lesson you are going to learn about

conductors and insulators.Can you remember what

these words mean?

Hmmm and insulators

are like the cotton woolin your head!

Conductors?Don’t they collect tickets

on the bus?





We are going to make acontainer that heats water using the Sun.

Energy from the Sun will need to betransferred to the water. Then you can

use the warm water to wash your hands.

That soundslike fun but what does

TRANSFER mean?





At home energy is TRANSFERRED in lots of ways. Look at thissaucepan where potatoes are beingboiled.

Heat energy is being transferred from the electric ring to the glasshob.

Heat energy is being transferred

from the glass hob to the metalsaucepan.

Heat energy is being transferred from the metal saucepan to the

water and potatoes.

Then can I transfer thepotatoes from the pan to

my stomach?





Radiator

gas waterheater

Here is another example. What do you think is going on?

1. Heat energy from burning gas in the heater is transferred

to w _ _ _ _.2. Heat energy from the hot w _ _ _ _ is transferred to themetal r _ _ _ _ _ _ _ .

3. Heat energy from the metal r _ _ _ _ _ _ _ is

transferred to the r _ _ _ .

radiator room

a t e ra t e r

a d i a t o r

a d i a t o r

o o m

12

3







Hats, coats, gloves and scarves are all insulators. They make itdifficult for heat energy to be transferred from your body tothe cold air, so they keep you warm.

Sometimes we don’t wantheat to be transferred, wewant to keep the heat in.

What do you know aboutall these things?





Tea cosy, burger box and thermos flask all prevent the transfer of heat.

Look at these things.These are insulators too.

What do they do?





glass

Polystyrenecup

Metalmug

Potterymug

Plasticmug

Papercup

Clue

Look at these containers. They will be filled with hot water.Which ones do you think are conductors that will allow thetransfer of heat energy most easily?

How will I knowwhich containers conductheat energy most easily?







A. clear sheet ofglass

B. dark colouredmetal

C. metal

waterpipes

D. thick board,such as

polystyrene

Materials that conduct or insulate are important parts of solarthermal collectors that heat water using the Sun’s energy.

Look at this diagram of a solar thermal collector.

Which parts are conductors and which are insulators?

Documents

PowerPoint Thermal Insulators and Conductors