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Discover rock secrets through these activities. Create a rock collection as you learn ... tell the different rock types apart, and see how rocks change from ...
http://www.learner.org/interactives/rockcycle/
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science
rocks
geology
rockcycle
interactive
rock_cycle
rock
rock-cycle
earth
geography
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interactive
museum
history
socialstudies
virtualfieldtrips
museums
science
maps
online
technology
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animals
games
science
zoo
habitats
animal
interactive
kids
game
kids_games
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activities
resources
science
links
lessons
4th
grade
fourthgrade
interactive
social
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science
experiment
experiments
milk
activities
science,
fun
videos,
kids
experiments",
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science
科普
china
教育
museum
科学
科技
encyclopedia
科學
百科
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USGS Publications Warehouse is a digital data warehouse containing citations and electronic versions of the entire report if available of USGS published reports and ...
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usgs
publications
reference
science
research
geology
government
database
search
maps
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NASA's home for all Mars missions past, present, and future. Aims to determine if life ever arose on Mars, characterize its climate and geology, and prepare for human exploration.
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space
mars
nasa
astronomy
geography
rover
science
kids
geology
exploration
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Middle School Science Projects - Middle school level projects (and science fair projects) with tips and resources for doing them the best way.
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science
projects
sciencefair
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science
homework
resources
teacher
middleschool
help
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science
blogs
biology
education
books
personal
blog
reviews
photos
health
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