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According to the kinetic-molecular theory, which substances are made of particles?
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
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:
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
Many objects, such as train tracks and road joints, are specifically designed to allow extra space for
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
What is expansion?
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
The liquid in a thermometer rises when it is placed in the hot water because
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
According to the kinetic-molecular theory, particles of matter
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
A substance is heated up and then allowed to cool down. What happens to the particles during this time period?
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
If a substance is cooled, what happens to its particles?
are in constant motion.
it gains heat from the hot water and expands.
all matter
An increase in a materials volume when temperature increases.
they slow down and move closer together
thermal expansion
The particles move faster and expand, then slow down and contract.
slow down and move closer together
Check it!