C.6 The Effects of Heat Flashcards
1
Q
what does expand mean
A
an increase in volume (size)
2
Q
what does contract mean
A
a decrease in volume (size)
3
Q
what does thermal expansion mean
A
when a substance expands because of an increase in thermal energy
4
Q
what happens when solid particles are heated
A
when particles are heated in z solid they start to expand and move faster
5
Q
why does hot air rise?
A
there is more space between the particles so it is less dense than the air around it.
6
Q
explain using the PMOM what would happen if you heated a liquid
A
the particles will spread apart and the liquid will expand.
7
Q
what does an increase in thermal energy cause?
A
expansion
8
Q
what does a decrease in thermal energy cause?
A
contraction
