Earth

What is the third planet from the sun?
How many continents are on Earth?
What is the largest ocean on Earth?
What is the highest mountain on Earth?
What is the primary gas in Earth's atmosphere?
Approximately how long does it take for Earth to orbit the Sun?
What percentage of Earth's surface is covered by water?
What is the innermost layer of Earth called?
Earth rotates on its axis from which direction?
What is the color of Earth when viewed from space?
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