Matter and Measurement Post Test

The separate atoms that make up a wooden table cannotbe seen because the atoms are

• too small.

• moving too fast

• packed tightly together

• hidden beneath the surface.

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

• an atom

• an electron

• a molecule

• a compound

Which statement best describes an atom?

• Atoms are the smallest particles of matter that are still elements.

• Atoms are composed of one or more elements in a fixed ratio.

• Atoms are broken down by physical means into subatomic particles.

• Atoms are tiny energy packets that produce a beam of light.

The teacher heats a pot of water. Once the water reaches 100°C, which point has the water reached?

• boiling

• melting

• freezing

• evaporating

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 was absorbed by the heat.

• It turned into water vapor.

Which will most likely happen to a solid substance that is heated?

• It will melt

• It will boil.

• It will harden.

• It will evaporate.

The metal lid on a glass jar is hard to open, so it is held under warm, running water. What causes the jar to open easily after it was held under the water?

• The water increased the pressure under the lid

• The jar shrunk with the warm water.

• The water acted as a lubricant between the glass and the metal.

• The metal lid expanded under warm water.

What are the three common states of matter?

• liquid, gas, vapor

• gas, liquid, fluid

• solid, gas, liquid

• solid, vapor, liquid

Mario pours three different liquids into a beaker. He notices the layers settle at different depths in the beaker.

Based on the picture, which property of the liquids is Mario most likely studying?

• density

• length

• mass

• volume

An iceberg is shown in the illustration below.

Why does the iceberg float instead of sinking to the bottom of the ocean?

• The water is more dense than the ice

• The ice weighs less than the water.

• The ice has a greater salt concentration than the water.

• The water has currents that force the ice upward.