States of Matter
This state of matter has particles that vibrate in place in a fixed arrangement.
Solid
A change from one state of matter to another.
Phase change
The most basic unit of matter
Atom
What causes the particles in a gas to spread far apart?
Kinetic Energy
What happens to the pressure of a gas when its temperature increases (at a constant volume)?
The pressure increases
Which state of matter has particles that are close together, but move freely past one another?
Liquid
A change in state from a solid to a liquid.
Melting
The force of the outward push of a gas over an area of the walls of the container.
Pressure
The total kinetic and potential energy of particles
Thermal Energy
What causes gas particles to exert pressure on the walls of a container?
Their collisions
This state of matter has indefinite shape and indefinite volume, and the particles move freely and rapidly.
Gas
A change in state from a liquid to a gas.
Vaporization/Evaporation
A measure of the average kinetic energy of an object's particles.
Temperature
Which temperature scale is based on the freezing and boiling points of water?
Celsius
What is the freezing point of water?
0o C
True or False
Water takes up more space as a liquid than it does as a solid.
False - Water takes up more space as a solid.
A change in state from a liquid to a solid.
Freezing
The temperature at which a liquid turns into a gas.
Boiling point
A change in ______________________ energy causes a phase change in matter.
Thermal
Why does water boil at a lower temperature in Denver than it does at sea level?
Denver has lower atmospheric pressure.
The particles in a solid make small movements called...
Vibrations
A change in state from a gas to a liquid.
Condensation
The process by which a substance changes directly from a gas to a solid, skipping the liquid phase.
Deposition
The process by which a substance changes directly from a solid to a gas, skipping the liquid phase.
Sublimation
A puddle slowly disappearing on a sunny day is an example of what change of state?
Evaporation