Air Unit

In this state of matter, the particles are very loosely packed and will continue to expand to fill the container they are in.

• Solid

• Liquid

• Gas

• Plasma

___________ is anything that has mass and takes up space.

• Properties

• Sunlight

• Length

• Matter

When warmed, the particles in matter will _______________.

• move more slowly

• move more quickly

• not move

• disappear

When cooled, the particles in matter will _____________.

• move more slowly

• move more quickly

• not move

• disappear

____________ is the amount of matter in an object.

• volume

• hardness

• density

• mass

When gases are heated, they __________ and ___________.

• expand; sink

• contract; sink

• contract; rise

• expand; rise

Sugar particles will _____________ in hot water than in cold water.

• dissolve more quickly

• dissolve more slowly

• will not dissolve

• float

If we add thermal energy to the container, the gas inside the bag will _______________.

• melt

• freeze

• expand

• contract

If we remove thermal energy from the container, the gas inside the bag will start to ___________________.

• contract

• evaporate

• expand

• freeze

After heating the container, the teacher released the bag from the neck of the container. Why did the bag rise into the air and float?

• The air inside the bag was more dense than the air around it.

• The air in the bag was evaporating.

• Gravity was no longer strong enough to pull on the bag.

• The air inside the bag was less dense than the air around it.