The Atmosphere The Lithosphere The Hydrosphere The Biosphere The Spheres of Earth The Atmosphere The Lithosphere The Hydrosphere The Biosphere

The Spheres of Earth When viewed from near, you can see that Earth is surrounded by a thin gas layer swirling with clouds. This represents one Sphere of Earth – the Atmosphere. The three Spheres of Earth which allow for life are: Atmosphere Lithosphere Hydrosphere

The Spheres of Earth Unlike the Moon, Earth’s gravity is so strong, it is able to hold gases close to the surface. Why is Earth’s gravity more than the Moon’s?

The Atmosphere Earth’s atmosphere is the layer of gases extending upward for hundreds of kilometers. It is made of about 78% nitrogen gas (N2), 21% oxygen gas (O2) and the remaining 1% is argon, water vapour, CO2, etc.

The Atmosphere Is critical to life on Earth It acts like a blanket providing us with moderate temperatures, protecting us from solar radiation, and ultraviolet light Without it we couldn’t survive

The Lithosphere Is the rocky outer shell of Earth containing the rocks and minerals that make up mountains, ocean floors and the land It ranges from 50 – 150 km in thickness

The Hydrosphere All the water on, above and below Earth’s surface Includes all oceans, lakes, ice, groundwater, and clouds

The Biosphere Describes the locations in which life can exist within the lithosphere, atmosphere and hydrosphere including several kilometers below the Earth’s surface

Bill Nye - Atmosphere