Things Change
When a solid changes to a liquid
melting
Nothing sucks, the _______________
atmospheric pressure pushes
It is the smallest particle of matter that retains its properties
Molecule
A change that occurs where no new substance is produced. An example would be a phase change.
Physical Change
Density is defined as:
Mass divided by Volume
When a liquid changes to a gas
boiling
As temperature increases, gas pressure ______
increases
According to the Kinetic Molecular Theory, everything is made of molecules and molecules are always _____
moving
A change that occurs when a new substance is produced
Chemical change
If something is less dense than water, will it float or sink?
Float
When a liquid changes to a solid
Freezing
As you climb up a mountain, the air pressure ______
decreases
_____ is the measure of the average motion of the molecules.
Temperature
During any change of matter there is also a change in _____
Energy
If something has a density of 1.10 g/mL, will it float or sink?
Sink
When a gas changes to a liquid
Condensing
The absence of pressure is called a
vacuum
All matter has these TWO characteristics.
(You must answer with both)
Mass and Volume
This can be OBSERVED during a chemical change
A gas is produced
or
There is a change in temperature
What unusual property does solid water (ice) have
It is less dense as a solid than it is as a liquid
When a solid changes directly to a gas
Sublimation
What happens to a the liquid propane (LP) cyclinder of a gas grill while you are grilling
It gets colder.
Daily Double: Double your points of you can explain why.
These types of molecules have a positive end and a negative end
Polar
The unique set of characteristics of a substance that do not change unless the substance turns into a different substance
properties
Daily Double: Double the points if you can name at least 2 properties and Triple the points if you can name a third property.
(Boiling Point, Melting Point, and Density)
An object is placed into a container with 325 mL of and the water level raises to 340 mL. If the object has a mass of 45 g, what is its density?
3 g/mL
340 mL - 325 mL = 15 mL
45 g / 15 mL = 3 g/mL