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WorksheetsHeating Systems
Total questions: 18
Worksheet time: 17mins
What kind of heating system is this?
Hot water heating system
Warm air heating system
Cold water heating system
Cold air heating system
What kind of heating system is this?
Hot water heating system
Warm air heating system
Cold water heating system
Cold air heating system
The radiator in a hot water heating system transfers thermal energy to its surroundings by
conduction
convection
radiation
Thermal energy is transferred throughout the air in a room by
conduction
convection
radiation
Which type of heating system uses radiators, pipes, and a boiler?
Warm air
Hot water
A fireplace
What do the arrows in this image represent?
Thermal energy transfer by conduction
Thermal energy transfer by convection
Thermal energy transfer by radiation
What are the two types of solar heating systems?
active
hot
passive
cold
Check passive or active.
This heating system is simple: reduce heat loss and increase heat gain from the sun
passive
active
In the Northern Hemisphere, which side of the house would you want your windows on in a passive solar heating system?
north
east
south
west
Solar heating systems rely on which natural source of thermal energy?
sun
geothermal
fire
decay
What colour would you want your floors/walls to be in order to absorb radiant energy in a passive solar heating system?
light pink
white
neon
dark (grey or black)
What helps heat from escaping in both active and passive solar heating systems?
good conductors
good insulation
good cupboards
good refrigerators
Can you create energy?
Yes
No
Heat can be
Transformed
Transferred
Transformed and Transferred
Particle Theory of Matter
Which of the following material is commonly used for insulation in homes?
a. Glass
b. Steel
c. Fiberglass
d. Plastic
What is the primary purpose of insulation?
a. To speed up heat transfer
b. To slow down heat transfer
c. To generate heat
d. To store heat
Which of the following best describes how heat is transferred in most situation?
a, From cold areas to warm areas
b. From warm areas to cold areas
c. From solid object to liquids
d. From liquids to gas
What principle do air conditioners use to cool down a room?
As a liquid evaporates into a gas, it absorbs heat.
As a gas condenses into a liquid, it releases heat.
As a liquid freezes into a solid, it absorbs heat.
As a solid melts into a liquid, it releases heat.
What happens to the molecules in a liquid as they absorb enough heat energy?
They overcome intermolecular attractions and take gaseous form.
They remain in a liquid state but move faster.
They form stronger chemical bonds.
They freeze into a solid state.
What is the basic job of an air conditioner?
To decrease the humidity inside a room.
To purify the air inside a room.
To increase the temperature inside a room.
To move heat from one place to another using a refrigerant.
What does the compressor in an air conditioner do?
It increases the pressure on the gaseous refrigerant to condense it back into a liquid.
It reduces the pressure on the gaseous refrigerant.
It heats up the refrigerant.
It cools down the refrigerant.
Why do air conditioners contribute to high power bills in July?
Because they are typically larger and consume more space.
Because they require water to operate.
Because the compressor needs energy to compress the refrigerant.
Because they are used less frequently.
What characteristic does a refrigerant need to have?
To be flammable and toxic.
To be solid at room temperature.
The ability to absorb a lot of heat as it boils.
A high boiling point.
What was the problem with chlorofluorocarbons (CFCs) as refrigerants?
They were too expensive.
They were too flammable.
They were not effective as refrigerants.
They caused damage to the ozone layer.
What is a disadvantage of hydrofluorocarbons (HFCs)?
They are not widely available.
They have a high boiling point.
They are greenhouse gases.
They damage the ozone layer.
Which of the following is considered a potential refrigerant due to its less potent greenhouse effect compared to HFCs?
CO2
Freon
Oxygen
Nitrogen
Why is it unlikely that we will give up on using air conditioning?
Because it is inexpensive to operate.
Because air conditioners also purify the air.
Because there are no alternatives to cool down spaces.
Due to the comfort it provides during scorching summers.
