Matter Unit Review 6P2

The separate atoms that make up a wooden table cannot be seen because the atoms are

• too small
• moving too fast
• packed tightly together
• hidden beneath the surface

A student put 200 milliliters (mL) of water into a pot, sets the pot on a burner, and heats the water to boil. When the pot is taken off the burner, it contains only 180 milliliters (mL) of water. What happened to the rest of the water?

• It was used up
• It condensed
• It turned into water vapor
• It was absorbed by the heat

Materials made of the same substance will have characteristics in common. Which property is most likely to remain constant (the same) in different samples of the same material?

• mass
• shape
• density
• volume

When water changes from a liquid to a gas and then the steam condenses back to the liquid form, these types of changes are

• physical
• chemical
• electrical
• mechanical

Which of these factors affects how fast a sound wave moves?

• The kind of material it is moving through.
• The wavelength of the disturbance in the medium
• The amplitude of the sound wave's vibrations
• The type of motion that caused the sound wave to form.

What is the smallest part of a gold ring that is still gold?

• an atom
• a molecule
• an electron
• a compound

Which of these is an example of water changing from water vapor to liquid?

• moisture forming on a mirror when you breathe on it
• sweat forming on your body when you exercise
• ice cubes melting when you put them in a warm liquid
• rivers drying up during a very hot summer

The speed of atoms is often affected by temperature. The diagrams show water at three different temperatures. In which picture are the atoms of water moving the fastest? *

• 1
• 2
• 3

When liquid water freezes, it forms ice. What is the physical state of an ice cube?

• gas
• liquid
• solid
• plasma

Anita heats a beaker containing water. As the temperature of the water increases, which change to the water molecules occurs? *

• The molecules move at a faster rate.
• The molecules become more massive.
• The molecules expand and become wider.
• The molecules separate into atoms of hydrogen and oxygen.