CH. 19: Air Pressure & Wind
Air Pressure=the pressure exerted by
the weight of air above.
Air pressure is very important factor in
predicting the weather!
Air pressure at sea level is 14.7 lbs per
Barometer=instrument used to
measure air pres
* 1915- Wegener proposes his hypothesis of
* Not widely accepted because he could not
* Died in 1930 still trying to figure it out.
Continental Drift - 240 million years ago there
was one supercontinent c
ENERGY AND MINERAL
Renewable and Nonrenewable
Renewable resource: can be replenished over fairly
short time spans (months, years, decades)
trees, cotton, other crops, fish, livestock, sun,
Chapter 3 - Rocks
Think about this
Why do we study rocks?
What can be learned by studying rocks?
Well we can learn mo better bout Mr Erf.
So what is a rock and where does it come
Wellatoms, like oxygen and carbon and
magnesiumand all the others comb
What are the 4 branches of Science?
Study of life
Study of composition of matter
Study of forces and motion
Study of the Earth and its surroundings
Four Branches of Earth Science
of the so
Chapter 18:1 Clouds & Precip.
Precipitation - any form of water that
falls from a cloud.
Water vapor makes up only 0-4 % of the
volume of air.
3 phases or states of matter(s,l,g)
6 phase changes - (f&m, e&c, s&d)
Changing state requires that energy is
CH 20 Patterns & Severe Weather
AIR MASSESare immense bodies of air.
Air Massesare characterized by 2 things:
2. Moisture Content
They can be 1600 km (1000 miles) across!
4 Air mass letter symbols:
(P) = polar, cool or cold
(T) = tropical
Chapter 17: The Atmosphere
Weather - the state of the atmosphere
at any given time and place.
Weather is constantly changing.
Climate - is weather over a long period
of time, describes regions.
Measure Of Weather
are caused by the tilt of Earth.
No tilt means no seasons
that Earth is tilted as it orbits
the sun (23 degrees).
The tilt always keeps the same angle.
Sometimes it tilts towards the sun and
sometimes it tilts away.
The Blue Planet
71 % of Earth is
covered by Oceans.
(avg. depth=1012,000 ft.)
4 major ocean
The study of the ocean.
Ocean life (plant and animal)
CH 5 Weathering, Soil, Mass
surface is constantly changing.
= breaking down and changing of
rocks at or near earths surface.
2 types of weathering
Mechanical and chemical
The break up of rocks by
1)What is soil?
2)Why is it important?
3)What makes one soil different from
What is soil?
The uppermost part of Earths crust which
supports plant growth.
Soil has 3 main characteristics, or traits.
What it is made (
Factors Affecting Eruptions
Hotter flows easier
Magma viscosity determined by temp and
composition. High silica = high viscosity (thickness)
High viscosity = violent eruptions
More gasses means more violent e