Earth's Subsystem

• Biosphere - The part of the Earth where life exists.
• Atmosphere - The gases that surround the Earth and make up the air.
• Cyanobacteria - blue-green algae, photosynthetic, single-celled organisms. (Evolved and carries Photosynthesis.)
• Hydrosphere - The water in the Earth's oceans, lakes, rivers, and groundwater
• Geosphere - The solid part of the Earth, including the crust and the upper part of the mantle.
• Alfred Wegener - He proposed that the continents were once joined together and that they drifted apart. (PANGAEA)