States of Matter
Which state of matter has a fixed shape and fixed volume?
Solid
When molecules move faster, does freedom of movement increase or decrease?
Freedom of movement increases
What can be added or removed to cause a phase change?
Energy
Solid → Liquid = ?
Melting
True or False
A substance can change phase without becoming a different substance.
True
Which state of matter can flow and take the shape of its container?
Liquid
Liquid → Gas
What happens to molecular movement?
Molecular movement increases
Slower particle motion means more or less energy?
Less energy
Gas → Liquid = ?
Condensation
A phase change is a:
A) Chemical change
B) Physical change
C) Nuclear change
D) Permanent change
B
Which state of matter has molecules that are far apart and move quickly?
Gas
What does molecular freedom of movement mean?
A. the way molecules in a substance move around relative to each other
B. substances are restricted in movement
C. Molecules are able to move less
D. creating energy
A
As temperature increases, what happens to energy?
Increases
Name one phase change that increases molecular motion.
Melting, Evaporation
If molecules change and move faster, what is the kinetic energy doing?
A. Decreasing
B. Increasing
C. Not changing
D. Depends on molecules
B. Increasing
Water changes from molecules moving around each other to moving in place.
What phase change happened?
Freezing
During evaporation, molecules move ______ and ______.
faster, far apart
To change a solid into a liquid, energy must be ______.
Added
Water changes from liquid to gas.
What happens to the molecules?
The move faster and father apart
Which change is an example of a phase change?
A) Burning paper
B) Rusting metal
C) Ice melting
D) Cooking an egg
C
Match the state to its behavior:
1. Fixed shape → _____
2. Flows → _____
3. Spreads out → _____
1. Solid
2. Liquid
3. Gas
During condensation, molecules move ______ and ______.
Slower, Closer together
If a substance had molecules moving around each other and enough energy was transferred into the substance to cause a phase change, what did the substance turn into?
Gas
Freezing happens when a ________ changes to a ________
Liquid changes to a solid
What happens to molecules when their kinetic energy decreases?
They move slower.