Particles
A _________________ is a small unit of matter
particle
What type of motion do particles in matter exhibit?
random motion
What is absolute zero on the Kelvin scale?
0K
Most highway bridges are built with expansion joints that can move back and forth. Based on what you learned about expansion and contraction, what is the reason for this?
To allow the bridge materials to expand and contract with temperature changes
If two substances are at the same temperature but one has more mass, which has more total energy?
the substance with more mass
The movement of particles from an area of higher concentration to lower concentration
diffusion
What happens to particles in a material when temperature decreases?
They slow down and move closer together
Describe how particles in liquids move
particles move freely
What happens to particles when thermal energy is added to a substance?
Their kinetic energy increases
What happens when food coloring is added to water?
The food coloring diffuses throughout the water
________________ is The average kinetic energy of particles in a material
temperature
Which type of particles have less kinetic energy?
gas or liquid?
liquid
___________________ is the increase in a material's volume when particle motion increases
thermal expansion
How do gas particles move compared to particles in other states of matter?
They move at high speeds in straight lines until they collide with something
On the Celsius temperature scale, at what temperature does water freeze?
0 degrees celcius
Which type of particles have more kinetic energy?
solids or gases
gases
What would happen to particles if a material were cooled to absolute zero?
They would not be moving and would have no kinetic energy
How do solid particles move?
They vibrate back and forth in place
At what temperature in farenheit is freezing point?
32 degrees farenheit
Which type of particles have less kinetic energy?
solids or gases
solids