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Lesson Seven: Heating and Insulating Technologies
Lesson Seven: Heating and Insulating Technologies
Today I am… learning about heating and insulating technologies
So I can… understand their importance and uses
I’ll know I have it when… I can explain the difference between an insulator and conductor
The estimated time to complete this lesson is 2 hours
By the end of the lesson...
By the end of the lesson...
You should be able to answer these questions:
Can I give examples of various heating technologies?
Can I list the four ways that heat can be produced?
Can I explain the difference between an insulator and a conductor?
Lets Review
Lets Review
Last lesson we learned about heat transfer. Try to answer these questions before we begin today.
What are the three forms of heat transfer?
Why are solids the best conductors?
How can we produce heat?
How can we produce heat?
Mechanical Energy
Mechanical Energy
Created through:
friction (rubbing)
percussion (hitting)
compression (pushing)
distortion (twisting)
These processes change mechanical energy into heat
Chemical Energy
Chemical Energy
Fuels like oil, wood, coal and natural gas have energy in them
The energy is called chemical energy
When these fuels are burned, they release the stored energy as heat
Electrical Energy
Electrical Energy
Electricity is in the wires in our house
This electricity can be used to heat some appliances
This causes the appliances to produce heat energy that we can use
Nuclear Energy
Nuclear Energy
At the center of each atom is a nucleus
Energy is stored in the nucleus
In nuclear fusion, multiple nuclei join together to form a larger nucleus
This is the way that the Sun produces energy
In nuclear fission, one nucleus splits into many nuclei
Can you think of any examples of how heat is produced using mechanical, chemical, electrical or nuclear energy? Write down your thoughts!
Test Your Knowledge
Test Your Knowledge
Watch the video and identify the types of heat production that are present!
Stop and Think
Stop and Think
So far we have learned about the three forms of heat transfer and the four ways that heat can be produced.
How have we used this knowledge to develop heat related technology?
Can you think of some forms of heating technologies?
What technologies are in your home? Your room?
Electricity
Electricity
Electric heaters create a convection current
The thermostat used to control the electric heater turns off when the room reaches the desired temperature
Water
Water
Water radiators create a convection current in the air and radiate heat to nearby objects
The water is heated by a furnace that uses oil, gas or electricity
Air
Air
This is a forced air heating system
Air is heated by a furnace and is pushed through the vents by a fan
Which of these heating technologies are used in your home?
What forms of heat production are used to heat these rooms?
Controlling Heat Transfer
Controlling Heat Transfer
Now that our houses are full of heat,
how do we get the heat to stay in the house?
how do we keep our houses warm in the winter? (Hint: think about how we keep ourselves warm in the winter)
Write down your thoughts!
Insulating Technology
Insulating Technology
To keep our houses warm in the winter and cold in the summer, they need to be insulated
A good insulator reduces heat out of a building in the winter and reduces heat into a building in the summer
Conductor vs. Insulator
Conductor vs. Insulator
We have already talked about conductors in our heat transfer lesson.
Conductors allow heat to flow through them very well.
Insulators on the other hand, do not let heat flow through very well.
Can you think of an insulator that you use?
Or an insulator that may be in your house?
What are some insulators?
What are some insulators?
In modern homes, the insulation is made of fiberglass because it traps air
Cellulose insulation and sawdust are some of the oldest types of insulation
Seaweed is also now being used as insulation
Sod House
Sod House
These houses were made of sod
Sod is earth
This was a popular house that people built in Saskatchewan
Do you think dirt is a good insulator?
Log House
Log House
Log cabins are another traditional home that were used for many years
Do you think that wood is a good insulator?
Test your knowledge
Test your knowledge
Complete the worksheet to make sure that you have a good understanding of the heating technologies that we have discussed!
Part one asks you to identify the difference between an insulator and a conductor
Part two asks you to identity and draw a heating technology in your home
Which material is the best insulator?
Which material is the best insulator?
Tim Hortons has hired you to figure out which material is the best insulator to keep their coffee hot for the longest time.
They have asked us to test:
Styrofoam
Metal
Glass
Ceramic
Paper
Which material do you think will be the best insulator of heat? Make a prediction based upon what you know about insulators.
How could we develop an experiment to test your predictions?
Stop and Think
Stop and Think
Using what you know about insulators, do you think that bubble wrap would be a good insulator? Why or why not?
How could you develop an experiment to test if it is or is not?
Before you go...
Before you go...
Make sure you can answer these questions so you know you have a good understanding of the material. Try to answer these questions before moving onto the next section.
What is the difference between a conductor and an insulator?
What are the four ways that heat can be produced?
What is a heating technology that can be used to heat a home?
Take the quiz to make sure you are on the right track!
References
References
Chandler, G. (2010, April 4). The Last of the Soddies. Retreived on April 18 from https://legionmagazine.com/en/2010/04/the-last-of-the-soddies/
National Geographic. (2016, September 22). How to make a friction fire. https://www.youtube.com/watch?v=1NynNqhepCM
Nelson Thomas Learning. (1999). Nelson Science & Technology 7.
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