Oceans
Many planets,One Earth
Water Resources
Atmosphere
Human Population Dynamic
100
95% is unexplored
What percentage of the ocean is unexplored?
100
How long ago did the first simple life appear on Earth?
3.8 billion years ago.
100
how does warming affect other aspect?
reducing the size of glaciers
100
earths atmosphere
What is a critical system for life on our planet?
100
why are human population trends important to environmental science ?
to determine the environmental impact of human activities
200
how many quarters of water is the earth covered?
3 quarters
200
This emerged approximately 2 billion years ago
What are complex life forms?
200
discharges into rivers and lakes
what has the u.s and european reduced ?
200
dynamic balance
where do most atmospheric process takes place in the state of ?
200
what have people tried estimate on earth for generations?
carrying capacity
300
creating conditions for life on land
what does the ocean play major part in ?
300
what was our solar system formed from ?
solar nebula
300
element for life
What covers three quarters of the earth ?
300
solar energy entering and radiant energy leaving the atmosphere
earth climate system maintains a dynamic balance between what ?
300
how did industrialization alter population growth rates so sharply?
one central factor was the mechanization of argiculture
400
the oceans
where did life on earth originate ?
400
wha is snow ball earth ?
earth was entirely covered in ice
400
greater evaporation on land
What does fresh water supply?
400
what are the humans action today toward this ?
are altering key dynamic balance in the atmosphere
400
what have developed nations passed through ?
demographic transition
500
thermocline
What is the sharp transition?
500
how long ago was the first eon of earths history
4.5 to 3.8 billion years ago
500
where do most precipitation infiltrates through soils and becomes what?
ground water
500
nitrogen ,oxygen, argon and water vapor
the atmosphere is composed of what ?
500
what is the demographic transition ?
well recognized pattern
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