
Environmental Science
Today’s Facts
Earth is a closed system where matter does not enter or leave, but energy can be exchanged with the outside environment.
Welcome to Environmental Science! – The Four Spheres of the Environment
Earth travels through space at 67,000 miles per hour around the sun.
Welcome to Environmental Science! – The Four Spheres of the Environment
The four spheres of Earth’s environment are the geosphere, hydrosphere, atmosphere, and biosphere.
Welcome to Environmental Science! – The Four Spheres of the Environment
The geosphere is the solid Earth, from rocky mountains to sandy beaches and magma deep underground.
Welcome to Environmental Science! – The Four Spheres of the Environment
The hydrosphere includes all water on Earth, whether in oceans, rivers, clouds, or soil.
Welcome to Environmental Science! – The Four Spheres of the Environment
The atmosphere is the unique mixture of gases critical for supporting life on Earth.
Welcome to Environmental Science! – The Four Spheres of the Environment

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Environmental Science Study Guide
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