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It contains the frozen parts of the planet
Crust, mantle and core are layers of _____________.
It is also known as the "ecosphere"
The four subsystems of the Earth are called__________.
Earth's atmosphere has ____ layers.
Which is the hottest layer of atmosphere?
What is the coldest layer in the atmosphere?
How many percent is the freshwater in the Earth's hydrosphere that is easily accessible by humans?
It extends from the surface of the Earth downward several miles into the lithosphere and upward approximately 7 miles into the atmosphere
"lithos" means _______.
globe or ball