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States & Phases of Matter Study Guide
States of Matter
They are the physical forms in which a substance can exist. The three most familiar states of
matter are solid, liquid, and gas.
Solid Volume: definite
Molecules: packed tight
Shape: definite
Movement: slow, vibrate in place
Liquid Volume: definite
Molecules: packed little loose
Shape: not definite, takes shape of container
Movement: a little
Shape: not definite, takes shape of container
Movement: very fast
Volume: not definite
Molecules: packed very loose
A solid’s internal structure’s particles are usually arranged in a repeating pattern called
______________________ (examples: salt or snowflakes)
Some solids are called ________________________ or “slow-moving liquid” because they
have no definite shape. (example: candle wax or glass)
______________________ is the resistance of a liquid to flow. The _________________ the
viscosity the “more slowly” it moves.
_______________________________ is a force that acts on the particles at the surface of the
liquid. It causes spherical drops of beads.
Phase Changes
Phase change is when one state of matter changes to another. __________________________
energy is what causes the change to occur. Heat is either added or removed.
The _____________ heat energy the faster and further apart the molecules move. The
__________________ heat energy the less movement and closer the molecules move.
When heat is added or absorbed it is called __________________________ (it gains energy).
Solid to liquid to gas. (SLG)
When heat is lost or removed it is called _________________________ (it loses energy). Gas to
liquid to solid. (GLS)
Solid to Liquid – melting
Liquid to Gas – evaporation
Solid to Gas – sublimation (dry ice)
Gains heat
Gas to Liquid – condensation
Liquid to Solid – freezing
Gas to Solid – deposition (frost)
Loses heat