Vocabulary
Random motion
movement at all directions and different speeds.
movement from a higher concentration to a lower concentration
Diffusion
Explain how solid particles move.
They vibrate.
What happens to particles and energy when they change state (from gas to liquid to solid)?
The energy decreases as the temperature lowers.
What is sublimation?
process in which solid becomes a gas.
Kinetic energy
energy of motion (motion or movement)
stored energy
Potential energy
Compare the kinetic speed of particles with their state of matter.
What happens to particles and energy when they change state (from solid to liquid to gas)?
The particles expand while the energy increases.
Compare freezing and melting.
Freezing: process in which a liquid becomes a solid
Melting: process in which a solid becomes a liquid
Thermodynamics
Study of heat
increase of volume due to temperature.
Thermal expansion
Draw and label the particle diffusion diagram.
board.
Think of a time when you saw a change of state. Explain what you observed in terms of particles and temperature. (do not use ice cream melting as an example)
Example.
Define solid
Thermal contraction
decrease of volume due to temperature.
measure of the kinetic energy in material.
Temperature
Compare boiling to vaporization in a Venn diagram.
Boiling is heating the liquid; evaporation is the transformation into gas.
How does energy determine the state of matter an object is in?
The fastest moving state has more energy or uses more energy while the slowest moving state of matter uses less energy.
Define liquid and gas.
Particles
smallest unit that makes up everything.
process in which a gas becomes a solid
Deposition
What four items does thermal energy depend on?
What is the freezing point of water?
What is the melting point of water?
Freezing point (0˚C), Melting Point (100˚C)
Image on the board.
Which substance is water? Explain your reason.
Substance A is water given the melting point (100C) and freezing point(0C) are the same as water.