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Chemistry
Science
Earth's Spheres
All Subcategories (19)
Atmosphere
Atmosphere, Biosphere, Hydrosphere, Lithosphere
Biosphere
Characteristics of Earth's Spheres
Climatic Zones
Composition/Mass
Cryosphere
Earth's Mass
Effects of Droughts
Gas Cycle
Gases and Life
Gases Cycle
Geosphere
Hydrosphere
Hydrosphere, Atmosphere, Biosphere, Geosphere
Hydrosphere, Geosphere, Atmosphere, Biosphere
Impact of the Sun's Disappearance
Landforms
Mass Distribution
Parent Categories (10)
Astronomy
Earth Science
Earth Sciences
Environment
Geography
Geology
Physical Systems
Science
Science/Ecology
Spheres