Definitions
Matter
States of Matter
Particles and Molecules
Density
100
What is condensation?
When gas changes into a liquid
100
Which is denser: rubber ball or styrofoam ball? How do you know?
rubber ball
100
What are the three states of matter?
solid, liquid, gas
100
When something is dense, the particles/molecules are close together or far apart?
Close together
100

Is alcohol or oil more dense?

Oil
200

What is matter? Name 2 characteristics.

Matter is anything that has mass and takes up space.

200
Give an example of a chemical property.
Examples: burning, rusting, chemical reaction (anything that involves changing one substance to another substance)
200
What is the opposite process of condensation?
Evaporation (liquid changing into gas)
200
What is the difference between atoms and molecules?
Molecules are two or more atoms together.
200

Does blown up balloon weigh more or empty balloon weigh more?

Blown up

300

What is density?

Measure of how much mass/matter or “stuff” there is in a given space/volume

300
Explain why freezing water is NOT a chemical property.
Water molecules do not change into another substance when you freeze water. They are still water molecules.
300
List the states of matter in order of density, starting with the least dense state.
Gas - Liquid - Solid
300
Do the size of the particles change when they change states? (For example, do the size of the particles change when something changes from a liquid to a solid?)
No, particles always stay the same size. The things that change are how fast they are moving and how close they are to each other.
300

Between as bowling ball and a soccer ball which on is more dense

Bowling

400

What is the difference between mass and weight? 

Mass is a measure of the amount of matter and it doesn’t change with location (like even if you are on a different planet with different gravity). Weight depends on the force of gravity on the matter.

400
Is water an element or compound? Explain.
Water is a compound because it is made up of two kinds of elements: hydrogen and oxygen.
400
Describe the motion and space between particles in a solid.
Particles are really close together in a nice orderly pattern. They are vibrating in place.
400
Describe what happens to the particles/molecules of water when water evaporates.
Particles/molecules start to move faster because of the heat energy and break loose of the liquid to become a gas.
400

Why does oil float on water?

Oil is less dense

500

What is the difference between physical and chemical properties?

Physical property = characteristic of a substance that can be observed without changing it into another substance. Chemical property = characteristic of a substance that described its ability to change into another substance. To see chemical property, you must change it to another substance.

500
Explain why matter weight changes but mass doesn't on different planets.
Weight is dependent on the gravity of the planet. The stronger the gravity on a planet, the heavier something would weigh. But mass is how much "stuff" something is made up of. That doesn't change no matter the location.
500
Describe what happens to particles/molecules as you add heat energy.
They start to move faster and space apart.
500
Can particles ever stop moving? Explain.
Yes, if matter is cooled down enough to absolute zero.
500

What was the most dense in the density tower

Water

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