Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
What is conduction? |
In heat: Heat transfer through contact/collision of successive electrons and atoms In electricity: Flow of electric charge through a conductor |
|
|
What are three processes of heat transfer? |
Conduction, convection, and radiation |
|
|
What are the differentiations of conduction, convention, and radiation? |
Conduction: Heat transfer by contact Convection: Heat transfer by moving heated liquid or gas Radiation: Heat transfer with no contact |
|
|
What determines if something is a good conductor?
|
How well any solid object conducts heat depending on the bonding within its atomic structure |
|
|
What atomic environment do we see in good conductors? |
Atoms have one or more loose outer shell electrons |
|
|
What is an insulator? |
Any object that resists the motion of molecules or is a poor heat conductor |
|
|
What atomic environment do we see in good insulators? |
Typically a tightly bound outer electron shell |
|
|
Are liquids and gases (fluids) good or poor conductors of heat? |
Poor conductors |
|
|
How does insulation work in regards to home insulation? |
It doesn't prevent heat loss, it slows the heat transfer down |
|
|
What is convection? |
Heat transfer by movement of a fluid or gas |
|
|
What does fluid refer to? |
Liquids and gases |
|
|
Why does rising air expand? |
Less atmospheric pressure |
|
|
Why does rising air cool? |
More space between molecules |
|
|
What is radiation? |
Movement of heat/energy from one object to another without physical contact |
|
|
How is radiation energy transferred? |
It's transmitted by electromagnetic waves |
|
|
How does energy from the sun pass through space and through Earth's atmosphere to warm the surface? |
Radiation energy (or radiant energy) |
|
|
What is frequency? |
The rate of vibration of a wave |
|
|
What can be said about frequency? |
The higher the frequency, the more energetic the radiant energy |
|
|
What is true about substances above absolute zero in regards to energy? |
All substances at any temp above absolute zero emit radiant energy |
