Lesson 2: Phase Changes Flashcards
1
Q
change of matter from one state to another
A
phase change
2
Q
are phase changes physical changes or chemical changes
A
physical changes
3
Q
true/false: phase changes are reversible
A
true
4
Q
what happens to energy during a phase change
A
it is either absorbed or released
5
Q
when is heat energy released
A
when molecules slow down and move closer to each other
6
Q
when is heat energy absorbed
A
when molecules speed up and expand
7
Q
liquid to solid
A
freezing
8
Q
solid to liquid
A
melting
9
Q
liquid to gas
A
evaporation
10
Q
solid to gas
A
sublimation
11
Q
gas to solid
A
deposition
12
Q
gas to liquid
A
condensation
13
Q
boiling point
A
100 celcius 212 fahrenheit 373 kelvin
14
Q
freezing point
A
0 c 32 f 273 k
15
Q
what is absolute zero
A
when time no longer affects the matter
16
Q
where is absolute zero
A
0 kelvin, -275.15 c, -459.67 f
