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CI Investigation 4
Test Description: Particle motion thermal contraction/expansion
Instructions: Answer all questions to get your test result.
1) According to the kinetic-molecular theory, particles of matter
A
are always fluid.
B
have different shapes.
C
are in constant motion.
D
have different colors
2) According to the kinetic-molecular theory, which substances are made of particles?
A
all matter except solids
B
all matter
C
liquids only
D
gases only
3) If a substance is cooled, what happens to its particles?
A
they speed up and move farther apart
B
the speed up and move closer together
C
they slow down and move farther apart
D
they slow down and move closer together
4) What is expansion?
A
Is a decrease in a materials volume when temperature decreases .
B
The transfer of thermal energy between materials by the collisions of particles.
C
An increase in a materials volume when temperature increases.
D
An increase in the mass of a substance.
5) What is contraction?
A
A decrease in a materials volume when its temperature decreases
B
A material through which thermal energy does not flow easily.
C
The movement of fluids in a cycle because of convection
D
The movement of particles.
6) A substance is heated up and then allowed to cool down. What happens to the particles during this time period?
A
The particles collide more frequently and become more dense.
B
The particles slow down and grow larger in size.
C
The particles move faster and expand, then slow down and contract.
D
The particles move fast and expand, then slow down and compress.
7) Many objects, such as train tracks and road joints, are specifically designed to allow extra space for
A
insulators
B
thermal expansion
C
thermal energy
D
specific heat
8) The liquid in a thermometer rises when it is placed in the hot water because
A
loses heat from the hot water and contracts.
B
the liquid is boiling.
C
the surrounding air is too warm.
D
it gains heat from the hot water and expands.
9) When objects contract upon cooling
A
volume decreases and density decreases.
B
volume decreases and density increases.
C
volume increases and density increases.
D
volume increases and density decreases.
10) Alex noticed that a metal door that sticks on hot days does not stick when it cools off at night. This is because the metal contracts as it cools. The reason for this is that, as the metal cools, the particles:
A
slow down and move closer together
B
become smaller and take up less space
C
merge together to form fewer atoms
D
speed up and move farther apart
*select an answer for all questions
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