Page 51 - Science Course 1 (Book 2)
P. 51
5. Thermal equilibrium occurs when the of materials that are in contact are the
same.
6. The volume that a material occupies decreases when the temperature of a material decreases.
This is called .
7. Almost all materials except contract when cooled.
8. Kinetic molecular theory is based on the knowledge that all matter is made up of ,
that particles are in constant , and that particles collide with each other
and the walls of any .
9. Ice f oats on water because it is less than water.
10. Particles that move faster occupy more and have higher .
.
Mo8-L2: Key Concept Check
Direction: Complete the cause-and-effect chart with the correct information on the lines provided.
Cause Effect
The particles in a material 1. The particles have
move in different directions
and at different speeds. .
2. The particles in the material move
The temperature increases.
.
The temperatures of materials 3. The materials are in
that are in contact are the .
same.
4. The volume that the material occupies
The temperature of a material
decreases. .
Water molecules collide with 5. The collisions transfer kinetic energy from the water to the
molecules in a bottle containing
water. .
6. The average kinetic energy of the molecules
Molecules move faster.
.
7. The temperature
The average thermal energy of
a material increases. .
8. Heat moves from your hand to the
You pick up a cold glass of milk.
.
9. Interactions among water molecules push the molecules
Water is cooled near its
freezing point. .
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