Unit C Heat and Temperature Flashcards
(20 cards)
What is the source of solar power?
Energy that is emitted from the sun
Solar power works by converting energy from the sun into power.
What are the two forms of solar energy?
- Electricity
- Heat
How is energy from solar panels used?
It goes to a solar farm and is converted into electricity for us to use
What is geothermal energy?
The heat that comes from inside the Earth
It comes from the Greek language.
What are some examples of natural fuels?
- Wood
- Oil
- Coal
- Natural gas
What is a passive solar system?
A system that is heated directly by the sun’s rays.
What is an active solar system?
A system that relies on some mechanical device to help transfer energy.
What is convection?
Heat transferred through gas or liquid particles, causing them to rise.
In which states of matter does convection occur?
Liquids and gases
What happens to hot air in convection?
Hot air rises because it has more kinetic energy.
What is radiation?
Heat transfers through invisible waves that can travel a great distance.
Can you feel heat from a hot object without touching it?
Yes, this is a typical case of radiation.
How do different colors affect heat absorption?
Different colours reflect different amounts of radiation.
What materials should be used when building a house for insulation?
Good insulators, not conductors.
What is a local heating system?
A system that provides heat for only one room or a small part of a building.
What is a central heating system?
A system that provides heat from a single, central source such as a furnace.
What are the basic parts of a cooling system?
- Storage tank
- Compressor
- Freezer unit
- Condenser coils
- Refrigerant
What is the purpose of insulation?
To limit heat loss to the colder outside environment.
What is the R-value in insulation?
A number given to every insulator, indicating its insulation performance.
What does a higher R-value indicate?
Better insulation performance.
