Heat and Temperature
What are particles?
Solar passive heated houses help keep the house _____ in the winter and ______ in the summer.
What is warm and cool?
Fireplaces and portable space heaters are used in this type of heating system.
What are local heating systems?
a refridgerant evaporates at ______ temperature
What is low
What are thermostats used for?
To switch appliances (furnaces, boilers) on and off at pre-set temperatures to maintain a constant temperature.
True or False: When the temperature of an object increases the average speed of particles increases?
True
2 types of solar heating are:
What are passive and active solar heating?
This is a type of centrl heating system which uses a boiler to heat water using gas or electricity to warm a home.
What is hot water central heating?
A device that uses electric energy to transfer thermal energy from a cooler location to a warmer location.
What is a refrigerator?
Why do bimetallic strips curve when heated?
The 2 metals expand at different rates. When one expands more than the other, the metal will curve.
Explain how energy moves when you touch a block of ice with your hand (what direction?).
Thermal energy from your hand goes to the ice and it starts to melt it. (energy always moves from hot to cold)
When we use the suns energy heats something directly.
What is passive solar heating?
What is geothermal energy?
3 types of non rewneable fossil fuels include:
What are oil, gas and coal?
True or false: composting releases thermal energy.
True
The coldest possible temperature in the universe in degrees Celcius and Kelvins are what?
-273 degrees Celcius or Zero Kelvins
In the winter in the northern hemisphere, what direction must the windows face in order to take full advantage of passive solar heating.
What is south?
Benefits: Sustainable/renewable, Reliable, Cheap (once made)
Drawbacks: Expensive to build
Why are fossil fuels non-renewable?
They take millions of years to form.
What is the Greenhouse Effect?
The trapping of heat energy in the Earth's atmosphere
Unit of measurement for thermal energy
What is Joules?
Houses that are heated by passive solar energy must have this to keep the heat in their houses.
What is insulation?
When you are struggling to unscrew the metal cap from a pickle jar, you can make things easier by holding the cap under hot water for a while before trying to open it again. Why does this help you to open the jar?
The metal expands more than the glass
The type of heat transfer that does not require particles
What is radiation?
Name the major greenhouse gas causing global warming.
What is carbon dioxide?