Particle Motion
How do gas particles move?
Freely, in all directions, constantly colliding with each other.
What is temperature a measure of/
The average kinetic energy of particles.
What is gas pressure caused by?
Collisions of gas particles with container walls.
Why does a balloon expand when heated?
Gas particles move faster and push outward.
The energy of motion is called ___
Kinetic energy
What happens to gas particles when thermal energy increases?
They move faster and spread farther apart.
What happens to the temperature when particles move faster?
Temperature increases.
What happens to pressure if temperature increases in a fixed container?
Pressure increases.
Why does a basketball feel flat in cold weather?
Particles slow down and pressure decreases.
The total energy of all particles is called____
Thermal Energy
When energy is removed, how does particle motion change?
Particles move slower and closer together.
What type of energy is transferred when something is heated?
Thermal Energy
What happens to pressure when volume increases (at the same temperature)?
Pressure decreases
Why should you never heat a closed metal can?
Pressure could build up and cause it to burst.
The amount of space a gas takes up is called___
Volume
Why do gas particles fill their entire container?
Because they move freely and spread out until evenly distributed.
What happens to the kinetic energy of particles when you remove heat?
If you squeeze a gas into a smaller space, what happens to the particles?
They collide more often, increasing pressure.
Why does a soda fizz when opened?
Pressure inside is released and gas escapes.
The force caused by particle collision is called___
Pressure
Describe how gas particle motion differs from solids and liquids?
Gas particles move freely and quickly, while solids vibrate and liquids flow around each other.
Explain the difference between temperature and thermal energy.
Temperature = average energy per particle
thermal energy = total energy of all particles
Why does a chip bag puff up when taken to high altitude?
Outside air pressure drops, so gas inside pushes outward more.
Why do tires feel more inflated on a hot day?
Heat increases particle motion and pressure inside the tire.
A model that shows how matter behaves is called a___
Particle model