Here are some key facts about the Earth.
• Earth's Physical Characteristics: Earth is the third planet from the Sun, approximately 93 million miles away, with a diameter of almost 13,000 kilometers. It is comprised of 71% water and 29% land, with a significant portion of water being saltwater, making readily usable freshwater scarce.
• Earth's Structure and Composition: Earth's structure includes a thin crust (approximately 50 kilometers thick) composed of shifting tectonic plates, underlying layers like the lithosphere, and a dense, hot iron core. Its atmosphere consists primarily of nitrogen and oxygen, with trace amounts of other gases.
• Life-Sustaining Conditions on Earth: The interplay of Earth's physical features, including its atmosphere and water resources, supports a vast array of life, ranging from single-celled organisms to complex ecosystems like rainforests.
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