EARTH

THE PHYSICAL REALM



RADIUS: 3,959mi (6,371km)

PLANET TYPE: Terrestrial

TEMPERATURE: 59°F (15°C)


earth

Earth is the only planet in the solar system that is capable of supporting advanced life. Its unique combination of liquid water, a rich oxygen and nitrogen-based atmosphere, and dynamic weather patterns provide the basic elements for a diverse distribution of plant and animal life. The atmosphere acts like a blanket, evening out temperature extremes and keeping warmth in. Without this "greenhouse effect", Earth would be about 60°F cooler on average. Over the last few decades, scientists have measured a gradual increase in Earth's temperature. Human activity is causing this rapid change by increasing the amount of carbon dioxide and other greenhouse gases in the atmosphere.









moon






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