Chapter 3
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What is a liquid?
A liquid is a substance where the particles are closely packed but they can slide past each other.
What is a solid?
Solid are objects with a set shaped, and it’s particles are closest together.
What is a gas?
A gas is a substance where the particles are always moving and rarely stick together.
What is plasma?
A state of matter that doesn’t have a definite shape because the particles have broken apart.
What is energy?
Ability to change or move matter.
What is thermal energy?
Total kinetic energy of the particles in an object.
What is evaporation?
The change is a substance from a liquid state to a gas
What is sublimation?
When solid turns directly to a gas
What is condensation?
Gas to liquid
What is a crystalline solid?
Orderly arrangement of atoms or molecules
Amorphous solid?
Composed of atoms and molecules with no particular order
Surface tension?
Force acting on the particles at the surface of a liquid that causes it to form circular drops.
Kinetic energy?
Energy of motion
Heat?
Energy that is transferred and causes temperature change
Endothermic change?
Changes that require energy Like melting an ice cube takes heat energy
Exothermic change?
When energy is released from a substance as it changes state (such as freezing water)