Particle Model of Matter
~ a lab notebook ~
O
H
H
Observation chamber
— fig. 1
cold solid — particles vibrating in place
cold particle
hot particle
— — bond (attractive force)
Heat control:
temperature
15°
← cooler
hotter →
freeze
melt
boil
state of matter:
Solid
e.g. ice
mass
30 particles
stays the same — no matter the state!
what's happening?
Particles are
packed tightly
in a fixed pattern. They only wiggle a little.
→ next: why does cold pull them together?