Properties of Matter
What do we call a state of matter that keeps its shape and does not change to fit its container?
Solid
How do gas molecules behave?
Gas molecules move away from each other
What is melting?
A solid becoming a liquid
What are the 3 phases?
Solid, Liquid, Gas
the relative size of things
Scale
What state of matter is described as having a definite volume but takes the shape of its container?
Liquid
Why can liquids flow?
Its molecules flow around each other
What happens to molecules during freezing?
They slow down and move closer together
How does the freedom of movement of molecules change during melting?
Increases
Something we can see with the naked eye
Macro Scale
Describe how the appearance of a solid differs from that of a gas.
A solid is rigid and keeps its shape, a gas has no visible shape
What happens to molecules during a phase change?
They move differently
Describe condensation in terms of molecular movement.
The molecules slow down and move closer together
How does the freedom of movement change during condensation
Decreases
Something we cannot see with the naked eye
Molecular scale
What is the main reason a solid maintains its shape at the molecular level?
Its molecules vibrate in place, they have very little freedom of movement
In which phase do molecules not move at all?
NONE! Molecules are always moving!
What is evaporation?
When a liquid becomes a gas.
How does the freedom of movement change during evaporation
increases
a noticeably different form or state of the same substance
phase
What do we call a state of matter that fills its container?
Gas
The freedom of movement determines how close/far apart the molecules move in relationship to each other, which determine the substances phase
What happens to the molecules of a substance when it evaporates?
They speed up and move apart
How does the freedom of movement change during freezing?
Decreases
a group of atoms joined together in a particular way
molecule