Matter
Phase Changes
Gas Laws
100
As a sample of matter is heated, what happens to their particles?
They speed up.
100
What is it called to go straight from a solid to a gas?
Sublimation
100
Matter with no definite volume or definite shape is called ______.
gas
200
What has definite shape and definite volume?
solid
200
On a cold winter day, frost can form on leaves even though there was no precipitation that day, this is an example of which of the following?
deposition
200
If the volume of a gas decreases while the temperature stays the same, what happens to the pressure of the gas?
A) It decreases
B) It increases
C) It stays the same
D) It disappears
A
300
Most matter ______________ when cooled.
contracts
300
On a humid summer day, Casie brought a glass of lemonade out on the porch. After 15 minutes passed there was a puddle of liquid surrounding her glass. Why?
a. Some of the lemonade evaporated into the environment.
b. The warm, humid air outside condensed on the cold glass.
c. Some of the lemonade leaked through small holes in the glass.
d. The cold, humid air inside condensed and leaked through the glass.
B
300
On a hot summer afternoon, a car’s tire pressure is higher than it was early in the cool morning. What is the best explanation for this change?
A) The number of air particles in the tire increased.
B) The tire expanded and created more air.
C) The air particles inside the tire moved faster and collided with the walls more often.
D) The tire lost air as the temperature increased.
C
400
Most matter contracts when its cooled. What does water do?
Expands
400
What is the triple point on a phase change diagram?
It's the point where a solid, liquid and gas exist simultaneously.
400
Each of these flasks contains the same number of molecules at the same temperature. In which container is the pressure highest?
Flask 1
500
Describe how the particles are moving in each state of matter.
Solid
Liquid
Gas
Plasma
Solid: Particles are tightly packed together and vibrate constantly
Liquid: Particles slide past each other.
Gas: Particles bounce off of each other & have very high kinetic energy.
Plasma: Matter made up of positively and negatively charged particles.
500
An uncovered pot of pasta is boiling on a stove, and there are water droplets on the wall above the back of the stove. Two phase changes happened. This first would be `_______` because the water is going from a liquid to a gas. The second would be `_______` because the gas turned into liquid making the droplets on the wall.
evaporation & condensation
500
Antwan conducted an experiment on nitrogen gas. Unfortunately, he forgot to label the axes. Based on the shape of the graph, which of the following pairs of labels are the MOST likely for the graph shown below?
The y-axis would be labeled ________ and the x-axis will be labeled _________.
x-axis: pressure
y-axis: volume