chapter 3: heat, light and sound Flashcards
1
Q
what is heat
A
the transfer of energy
2
Q
temperature goes from … area to … areas
A
hot
cool
3
Q
conduction
A
particles touching (vibrating)
4
Q
radiation
A
where heat is transferred via electromagnetic waves
5
Q
the particles of hotter substances move … than the particles of cooler substances
A
faster
6
Q
absolute zero
A
particles lose kinetic energy and barely move at all
-273 C
7
Q
conductors
A
substances that transfer heat
- metals
8
Q
insulators
A
poor conductors if heat and can sometimes block heat transfer completely
- rubber
- plastic
- wood
9
Q
convection
A
heat transfer by hot air being pushed upwards by cooler air around it
10
Q
longitudinal waves
A
| | | | |
11
Q
transversal waves
A
~~~~~
12
Q
concave lens
A
)(
light diverges
13
Q
convex lens
A
()
focal converges
