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Particles in Motion
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When a liquid is heated up, what changes: volume, mass, or both?
Volume
In _________ particles are hardly held together at all.
Gas
In __________ particles are held together not as tightly.
Liquids
In _______ the particles are held tightly together.
Solids
What is the study of heat called?
Thermodynamics
What are the 3 states of matter?
Solid, liquid, gas
What do solid particles do when they move?
Vibrate
What is it called when energy is being stored?
Potential energy
What is diffusion
When two things mix to become one
What is thermal contraction?
When heat energy decreases, the particles slow down and take up less space
What is Thermal Expansion?
When heat energy increases, the particles move faster bumping into each other and pushing farther away taking up more space
What is random motion?
When particles move in every direction at different speeds
Why do hot-air balloons fly in the early morning or late afternoon?
The air is less dense
What happens to liquid when it is warmed?
It expands
If metal bars are heated up to determine how their volume and length would be affected, what is the outcome?
Both the volume and length would change
When temperature increases, what else increases?
Kinetic Energy
When something is heated up, and the particles gain energy and move apart, the volume increases. What happens to the mass?
It stays the same
What is temperature?
The measure of the average kinetic energy of the particles in a material
When heat energy heats up water and causes it to bubble, what is happening?
The water is boiling
What is the energy of motion called?
Kinetic Energy
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