True or false: When water molecules are cooled, they huddle closer together.
true
100
What's the name of the process in which molecules of a gas slow down, come together, and form a liquid?
condensation
100
Does air have mass?
Yup
100
What is the density of water?
1 g/cm3
200
Matter is made up of extremely tiny particles called _____________.
atoms/molecules
200
True or false: When water molecules are cooled, they speed up in order to keep warm.
false
200
What process occurs when molecules in a liquid gain enough energy that they overcome attractions to other molecules and break away to become a gas?
evaporation
200
Does liquid have density?
You betcha
200
What is the equation for finding density?
d=m/v
300
The three phases of matter are ...
solid, liquid, gas
300
Heat causes _________ space between water molecules.
more
300
How does temperature affect evaporation?
Heat causes molecules to move faster and break away to form a gas at a faster rate.
300
True or false: Volume is measured in grams.
FALSE!
300
What is the water displacement method used for?
finding the volume of irregularly shaped objects
400
In this phase of matter, atoms and molecules are the least attracted to one another.
gas
400
Are cold water molecules closer or farther apart than room temperature water molecules?
closer
400
How does temperature affect condensation?
Cold surfaces cause molecules to slow down and more quickly return to a liquid state.
400
What is the definition of volume?
Volume is the amount of space something takes up.
400
True or false: Density is the relationship between the mass of a substance and its volume.
true
500
In this phase of matter, atoms and molecules have a definite shape and a definite volume.
solid
500
What is the unique property of water when it freezes?
Molecules move farther apart (it expands).
500
Give one example of evaporation and one example of condensation.
:)
500
Explain the process of finding the volume of a liquid.
1. Find the mass of an empty container.
2. Find the mass of the container with liquid in it.
3. Subtract the mass of the container.
4. Remaining amount is the volume.