Do you still remember about the arrangement of particles in gases???
WATCH IT !!!!!!
What can you understand about Kinetic Molecular Theory ????
List out the characteristics of the theory.....
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NOTES:
AIR PRESSURE
The Kinetic theory of gases
1. The kinetic theory of gases states that particles in a matter are always moving or vibrating. Gas
particles in a matter are always moving or vibrating. Gas particles in a container collide with each other and with the walls of the container all the time.
2. Air or gases are matter that have particles that move randomly in all directions.
Producing air Pressure
1. Air has mass. Therefore air has weight.
2. Air has particles that are continually moving and colliding with things on Earth. These collisions
produce air pressure.
3. Air presses down on all things in the Earth's surface. The pressure exerted by air is known as air
pressure or atmospheric pressure.
4. The features of air pressure are :
(a) acts in all direction
(b) changes from one place to another
(c) decreases the higher you go above ground level. This feature exists because at high place, the
amount on air decreases. This explains why the air pressure on the top of a mountain is lower
that at the foot of the mountain.
Resource: http://form2notes.blogspot.com/2010/11/science-form-2-air-pressure.html
Exercise
1) The layer of air surrounding Earth has ___________ and occupies ____________
2) Air particles move _____________. The collisions between air particles and the walls of a container cause _____________
3) The characteristics of Theory Kinetic Gas:
a) _______________________
b) _______________________
c) ________________________
