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What is an ecosystem, and how can we study one? Is the earth an open or closed system ... How do we define "biogeochemical cycles," and how are they important ...
http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/ecosystem/ecosystem.html
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ecosystem
ecology
ecosystems
science
biomes
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NatureServe and its network of natural heritage programs serve as a source for information about rare and endangered species and threatened ecosystems.
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conservation
environment
science
ecology
nature
animals
biology
reference
biodiversity
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science
games
interactive
environment
ocean
ecology
education
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environment
science
ecology
interactive
education
biology
resources
earth
lessons
environmental
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Estimates how much productive land and water you need to support what you use and what you discard. Created by Earth Day Network and Redefining Progress.
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environment
sustainability
ecology
quiz
science
conservation
footprint
green
earth
energy
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environment
science
education
teaching
ecology
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curriculum
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conservation
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science
biology
education
experiments
plants
ecology
teaching
botany
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howto
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Fun, interactive way to learn about the three R's: reduce, reuse, and recycle. EPA's Recycle City offers kids online activities and games.
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recycling
science
environment
recycle
ecology
interactive
education
games
earth
socialstudies
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Online games and education. kids educational games. Kids Corner. Herbivore, Carnivore, Omnivore. Online learning. Animal diet. Free online games for kids.
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science
foodchain
food
games
chain
ecosystems
animals
game
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foodchains
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Comprehensive resource for science-based information about the environment. ... About the EarthPortal. Community of Scholars. EoE: Educators' Feedback ...
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environment
science
earth
reference
sustainability
news
activism
ecology
biology
portal
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Explore Manhattan Island and its native wildlife in 1609. From the Worldlife Conservation Society.
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history
nyc
maps
environment
science
manhattan
newyork
ecology
visualization
map
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