Particle Model
What are the tiny building blocks that make up all matter?
Particles
Which state has a definite shape?
A. Solid
B. Liquid
C. Gas
D. Plasma
A. Solid
Ice changing into water is _________.
A. Melting
B. Freezing
Melting
Adding heat makes particles _____________.
A. Move slower
B. Move faster
B. Move faster
You can smell perfume because its particles:
A. Move through the air
B. Stay inside the bottle
A. Move through the air
According to the Particle Model, particles are always __________.
in constant motion
Which state has particles moving freely?
A. Solid
B. Liquid
C. Gas
D. Bose-Einstein Condensate
C. Gas
During melting, particle energy ___________.
A. Increases
B. Decreases
A. Increases
Heating a solid causes its particles to _____________.
A. Vibrate more
B. Stop moving
A. Vibrate more
A flat tire feels softer because:
A. The particles become heavier.
B. There are fewer particles pushing outward.
B. There are fewer particles pushing outward.
What determines the physical properties of matter, such as density and flow?
Arrangement and motion of particles
Gas particles have ___________.
A. Strong attractions
B. Weak attractions
B. Weak attractions
When water boils, particles ________.
A. Move faster
B. Move slower
A. Move faster
A heated metal rod will __________.
A. Expand slightly
B. Shrink
A. Expand slightly
Two different gases placed together will eventually:
A. Stay separated
B. Mix evenly
B. Mix evenly
When a solid is compressed, the particles become ___________.
A. Closer together
B. Smaller
A. Closer together
Why can gases fill a container?
A. Their particles move freely.
B. Their particles are larger.
A. Their particles move freely.
Dry ice changes directly into gas by ____________.
A. Sublimation
B. Condensation
A. Sublimation
As water boils, particle spacing __________.
A. Increases
B. Decreases
A. Increases
A helium balloon floats because helium is:
A. Lighter than air
B. Heavier than air
A. Lighter than air
How does the Particle Model describe a mixture of salt and pepper?
A. Chemically combined
B. Mixed but not chemically combined
B. Mixed but not chemically combined
Compared with vapor, liquid particles are:
A. Closer together
B. Farther apart
A. Closer together
Water expands when it freezes because __________.
A. Molecules need more space.
B. Molecules disappear.
A. Molecules need more space.
Removing heat from a substance causes particles to __________.
A. Move slower
B. Move faster
A. Move slower
Water droplets outside a cold glass are formed by:
A. Condensation
B. Evaporation
A. Condensation