CI Investigation 4 Question Preview (ID: 45662)
Particle Motion Thermal Contraction/expansion.
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According to the kinetic-molecular theory, particles of matter
a) are in constant motion.
b) have different shapes.
c) have different colors
d) are always fluid.
According to the kinetic-molecular theory, which substances are made of particles?
a) gases only
b) liquids only
c) all matter
d) all matter except solids
If a substance is cooled, what happens to its particles?
a) they slow down and move closer together
b) they slow down and move farther apart
c) the speed up and move closer together
d) they speed up and move farther apart
What is expansion?
a) The transfer of thermal energy between materials by the collisions of particles.
b) An increase in a materials volume when temperature increases.
c) Is a decrease in a materials volume when temperature decreases .
d) An increase in the mass of a substance.
What is contraction?
a) The movement of particles.
b) A decrease in a materials volume when its temperature decreases
c) The movement of fluids in a cycle because of convection
d) A material through which thermal energy does not flow easily.
A substance is heated up and then allowed to cool down. What happens to the particles during this time period?
a) The particles move fast and expand, then slow down and compress.
b) The particles slow down and grow larger in size.
c) The particles collide more frequently and become more dense.
d) The particles move faster and expand, then slow down and contract.
Many objects, such as train tracks and road joints, are specifically designed to allow extra space for
a) thermal energy
b) thermal expansion
c) specific heat
d) insulators
The liquid in a thermometer rises when it is placed in the hot water because
a) it gains heat from the hot water and expands.
b) the surrounding air is too warm.
c) loses heat from the hot water and contracts.
d) the liquid is boiling.
When objects contract upon cooling
a) volume increases and density increases.
b) volume decreases and density decreases.
c) volume increases and density decreases.
d) volume decreases and density increases.
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) become smaller and take up less space
b) merge together to form fewer atoms
c) slow down and move closer together
d) speed up and move farther apart
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