Particles
The particle model of matter states that ___________ matter causes particles to move faster
heating
What are the freezing and boiling points of water?
0 degrees C
100 degrees C
Describes the particles of a solid. List 3 things.
strongly attracted to each other
vibrate in place
fixed shape and volume
Volume
space
Melting
Solid to liquid
As particles move faster, the attractive forces between them ________________ and the space between them _______________.
weaken
increases
What is thermal expansion and what is it a result of?
Something gets bigger
heating
Describe the particles of a liquid. List 3 things.
particles are slightly farther apart
No fixed shape
slide past each other
mass
the amount of matter
freezing
liquid to solid
As matter cools down, the particles move __________.
slower
What is thermal contraction and what is it a result of?
Something gets smaller
cooling
Describe the particles of a gas. List 3 things.
particles are far apart
no fixed shape or volume
expand to fill their container.
density
How packed the particles are
Evaporation
liquid to gas
As particles slow down, the attractive forces between them ____________ and the space between them ___________.
increases
decreases
Water has a greater volume in _______ form than liquid form
solid
How are potholes formed?
Freeze thaw cycle
Intermolecular forces
What holds particles together.
condensation
gas to liquid
What always stays the same even when there is a phase change?
mass
Why does ice float on water and not sink? Why is this important?
Solid water is less dense than liquid water. To protect the wildlife living in the water.
Which material begins to expand at the highest temperature and why is that important?
Asphalt (around 50 degrees C). Almost heat resistant, which is beneficial for road construction.
matter
everything that takes up space
sublimation
Deposition
S: gas to solid
D: solid to gas