Properties of Air
Apr 10-5:02 PM
1
Questions
I) Matter
A) Matter is anything that meets the following two
conditions:
1) ___________________________________________
2) ___________________________________________
B) All matter is made up of _________________________.
1) There are over __________ different types of atoms
that make up all matter.
2) These atoms combine to form ___________________.
3) Matter generally exists in three states.
a) _________________________________________
b) _________________________________________
c) _________________________________________
http://www.chem.purdue.edu/gchelp/atoms/states.html
Apr 10-5:10 PM
2
Questions
II) Matter
A) Air is a mixture of gasses.
1) 78% is the gas _______________________________.
2) 20% is the gas _______________________________.
3) 1% is the gas ________________________________.
4) 1% is a mixture of other gasses.
B) Air is a form of matter.
1) Air takes up space (volume). Remember the following
demonstrations from class:
a) A paper towel stayed dry when it was in an
upside down beaker under water because the air
filled the space in the beaker and the water
couldn't get in.
b) When air was forced into a flask full of water, the
water was pushed out to make room for the air.
Apr 10-5:19 PM
3
Questions
2) Air has mass (weight). Remember the following
demonstrations from class:
a) Two inflated balloons were balanced on a scale.
When one was deflated, the scale tipped to the
side with the inflated balloon.
b) Two paper bags were balanced on a scale.
When carbon dioxide was put in one of the
bags, the scale tipped to that side.
3) Air exerts (puts) pressure on anything it touches.
Remember the following demonstrations from
class:
a) The suction cup being pinned to the desk by
the outside air pressure.
b) A piece of cardboard stayed on an upside down
beaker full of water because the air pressure
held it there.
c) A 2 liter bottle was crushed by the outside
air pressure.
d) An egg was pushed into a bottle by outside
air pressure.
Apr 10-5:26 PM
4
Questions
4) Hot air expands and cold air contracts. Remember
the following demonstrations from class:
a) When an inflated balloon was run under cold
water the circumfrence decreased, but when it
was run under hot water the circumfrence
increased.
b) A balloon was attached to a flask full of air.
When the air was heated, the balloon inflated,
but when the air was cooled, the balloon
deflated.
Apr 10-5:35 PM
5