Oceans
Many planets,One Earth
Water Resources
Atmosphere
Human Population Dynamic
100
14.7 pounds per square inch
What is the atmospheric pressure per square inch?
100
How long ago did the first simple life appear on Earth?
3.8 billion years ago.
100
what does underground aquifers supply ?
fresh water for irrigation , drinking and sanitation
100
dynamic balance
where do most atmospheric process take place ?
100
for generations people have tried to estimate about earth?
carrying capacity
200
It is called the Ring of Fire.
What is the arc of volcanoes around the pacific ocean that denotes convergent plates moving called?
200
This emerged approximately 2 billion years ago
What are complex life forms?
200
what is one the greatest health challenges facing national governments today ?
providing safe water for more than one 1 billion people
200
solar energy
earths climate system maintains a dynamic balance between what ?
300
a key mechanism that helps to regulate earths climate
What is thermohaline circulation ?
300
what was our solar system formed from ?
solar nebula
300
pollution discharges
european countries have reduced what into rivers and lakes ?
300
what is the atmosphere composed of ?
nitrogen ,oxygen , argon and water vapor
300
the phased reduction in birth and death rates.
What is demographic transition?
400
the oceans redistribute heat from high to low latitudes by moving warm water from the equator toward the poles
how does ocean circulation affect earths climate ?
400
wha is snow ball earth ?
earth was entirely covered in ice
400
three quarters
how many quarters of water does it cover earths surface?
400
where does mostly all the weather occur ?
in the troposphere
500
where are oceans the warmest ?
in the tropics
500
how long ago was the first eon of earths history
4.5 to 3.8 billion years ago
500
Solid, liquid, and Gas
What are the three cycle phases?
500
what is the third atmospheric layer ?
the mesosphere
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