PARTICLES IN MOTION
a small unit of matter
What is a particle?
the ability to cause change
What is energy?
This has more energy than a colder object
What is a heated object?
Changes the speed and direction of gas particles
What is collision?
Because the particles are holding each other in place.
Why are expansion and contraction in solids less noticeable?
every gas, liquid, solid
Scientists use "this" to observe how fast the particles of a substance move.
What is diffusion?
The increase in volume of a material when particle motion increases
What is thermal expansion?
The particles vibrate back and and forth in place in this state of matter.
What is a solid?
When heat increases this happens
Particles move faster and farther apart
movement in all directions and different speeds
What is random motion?
motion energy
What is kinetic energy?
When particle motion decreases and causes the particle to occupy less volume
What is thermal contraction?
Substances have more energy when they have more...
Mass
This has a definite shape.
What is a solid?
movement of particles from an area of higher concentration to an area of lower concentration
What is diffusion?
the speed of particles increases
What happens when kinetic energy increases?
The measure of average kinetic energy of the particles in a material
What is temperature?
Substances have the same kinetic energy when they have the same....
temperature
You draw this to show particles are moving faster
What are motion lines?
when the concentration is the same throughout the container
When does diffusion stop?
Particles have more kinetic energy
What happens when particles move faster?
To compare temperature, you need to use this
What is a temperature scale?
Kinetic energy can be measured by comparing...
temperatures of substances
The study of heat
What is thermodynamics?