Layer of gasses surrounding the earth
Kept in place by gravity
1% water vapor
0.038 % Carbon Dioxide
Other gasses in small amounts
What it does:
Absorbs harmful UV rays
THE DIFFERENT ATMOSPHERIC LAYERS-Troposphere:
Takes up half of all the entire atmosphere
Weather and jetstream occur here
Contains 75% of gasses in atmosphere
Begins at earths surface and rises to 20km (approx. 15miles)
2nd layer up fro
Forms when one body of moist air mixes with another of a different temperature.
May cause air temperature to cool to a point where condensation and cloud
Can occur at any altitude (fog is a cloud)
Clouds are named based on the wa
Geologic Time Scale
Permian Period230,000,000 to 280,000,000
-many land plants, and animals
Pennsylvanian Period280,000,000 to 310,000,000
-spiders, reptiles, insects
Mississippian Period310,000,000 to 345,000,000
-many crinoids, swamp forests, sharks
Relative Dating: puts event in order
Types of fossils that are known to occur together,
Rock layers law of superposition
Absolute Dating: assigns a time to each event
Radioactive decay radioactive particles in matter change over time, can
Early mapmakers (Columbus and Magellan) recorded observations about coastlines said
to look like puzzle pieces.
Alfred Wegener German scientist, 1912, Theory of Continental Drift. Using rock, fossil
and climatic evidence, bu
The following map shows current major plate boundaries and their relative motions.
You should be able to describe various landforms created by different plate movements.
What some people thought of plate tectonics:
How plates are thou
Sources of Water Pollution Graph and Notes
Think for a few moments about each question. Try to answer them into your notes.
What is water quality?
Are all sources of water affected?
How do the pollutants get there?
What are some key pol
Measures acidity of water. Range of 1-14. 7 is neutral. (rainwater is typically from
6-6.7, with acid rain around 5.5-6.5)
Changes are not as frequent or dramatic as outside air temperature, water subject
to thermal pollution from facto