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Life on Earth

WORD LIST
ABIOGENESIS
ABUNDANT
ATMOSPHERE
BILLIONS
CARBON DIOXIDE
CIRCULATIOIN
COSMOLOGY
DECOMPOSERS
EVOLUTION
HEALTH
HELIUM
HYDROGEN
KNOWLEDGE
LAYERS
LIFE
METALS
MILLIONS
MIXTURE
MOON
MYTHOLOGY
NATURAL
NITROGEN
NUTRIENTS
OXYGEN
PERSPIRATION
PHOTOSYNTHESIS
PLANET
SCIENCE
SURVIVAL
SURVIVAL
THRIVE
UNIVERSE
VOLCANOES
WATER