what size is your carbon footprint? thermal insulators and conductors in this lesson you are going...
TRANSCRIPT
Slide 1Thermal Insulators and Conductors
Can you remember what
in your head!
What size is your carbon footprint?
Thermal Insulators and Conductors
container that heats water using the Sun.
Energy from the Sun will need to be
transferred to the water. Then you can
use the warm water to wash
your hands.
That sounds
What size is your carbon footprint?
Thermal Insulators and Conductors
At home energy is TRANSFERRED in lots of ways. Look at this saucepan where potatoes are being boiled.
Heat energy is being transferred from the electric ring to the glass hob.
Heat energy is being transferred from the glass hob to the metal saucepan.
Heat energy is being transferred from the metal saucepan to the water and potatoes.
Then can I transfer the potatoes from the pan to my stomach?
What size is your carbon footprint?
Thermal Insulators and Conductors
gas water heater
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 the metal r _ _ _ _ _ _ _ .
3. Heat energy from the metal r _ _ _ _ _ _ _ is transferred to the r _ _ _ .
radiator
room
o o m
Thermal Insulators and Conductors
What do we call things that allow heat energy to transfer easily?
Metal hob
They are called conductors.
The heat energy is transferred from the burning fuel, to the metal hob, to the metal saucepan and kettle and then to the water. Heat energy is being transferred from the water to the spoon in the saucepan too.
Good conductors
feel cold when there is
no source of heat. They don’t retain heat but let it be transferred away.
What size is your carbon footprint?
Thermal Insulators and Conductors
Hats, coats, gloves and scarves are all insulators. They make it difficult for heat energy to be transferred from your body to the cold air, so they keep you warm.
Sometimes we don’t want heat to be transferred, we want to keep the heat in.
What do you know about all these things?
What size is your carbon footprint?
Thermal Insulators and Conductors
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?
Thermal Insulators and Conductors
Clue
Look at these containers. They will be filled with hot water.
Which ones do you think are conductors that will allow the transfer of heat energy most easily?
How will I know
What size is your carbon footprint?
Thermal Insulators and Conductors
Here is a fun activity. Use your fingers to find out which materials are good conductors and which are good insulators. Use a table like this one.
Conductors Feel cold to touch.
Insulators Do not feel cold to touch.
Metal scissors
Thermal Insulators and Conductors
B. dark coloured metal
C. metal water pipes
D. thick board, such as polystyrene
Materials that conduct or insulate are important parts of solar thermal 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?
Can you remember what
in your head!
What size is your carbon footprint?
Thermal Insulators and Conductors
container that heats water using the Sun.
Energy from the Sun will need to be
transferred to the water. Then you can
use the warm water to wash
your hands.
That sounds
What size is your carbon footprint?
Thermal Insulators and Conductors
At home energy is TRANSFERRED in lots of ways. Look at this saucepan where potatoes are being boiled.
Heat energy is being transferred from the electric ring to the glass hob.
Heat energy is being transferred from the glass hob to the metal saucepan.
Heat energy is being transferred from the metal saucepan to the water and potatoes.
Then can I transfer the potatoes from the pan to my stomach?
What size is your carbon footprint?
Thermal Insulators and Conductors
gas water heater
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 the metal r _ _ _ _ _ _ _ .
3. Heat energy from the metal r _ _ _ _ _ _ _ is transferred to the r _ _ _ .
radiator
room
o o m
Thermal Insulators and Conductors
What do we call things that allow heat energy to transfer easily?
Metal hob
They are called conductors.
The heat energy is transferred from the burning fuel, to the metal hob, to the metal saucepan and kettle and then to the water. Heat energy is being transferred from the water to the spoon in the saucepan too.
Good conductors
feel cold when there is
no source of heat. They don’t retain heat but let it be transferred away.
What size is your carbon footprint?
Thermal Insulators and Conductors
Hats, coats, gloves and scarves are all insulators. They make it difficult for heat energy to be transferred from your body to the cold air, so they keep you warm.
Sometimes we don’t want heat to be transferred, we want to keep the heat in.
What do you know about all these things?
What size is your carbon footprint?
Thermal Insulators and Conductors
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?
Thermal Insulators and Conductors
Clue
Look at these containers. They will be filled with hot water.
Which ones do you think are conductors that will allow the transfer of heat energy most easily?
How will I know
What size is your carbon footprint?
Thermal Insulators and Conductors
Here is a fun activity. Use your fingers to find out which materials are good conductors and which are good insulators. Use a table like this one.
Conductors Feel cold to touch.
Insulators Do not feel cold to touch.
Metal scissors
Thermal Insulators and Conductors
B. dark coloured metal
C. metal water pipes
D. thick board, such as polystyrene
Materials that conduct or insulate are important parts of solar thermal 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?