Earth

EARTH

Earth is is the third planet from the Sun. Earth is part of the inner planets. Earth has one moon, and its name is the Moon. Its neighbor's are Venus and Mars. Earth is sometimes known as the blue planet or the world. Earth is 149,600,000 kilometers (one astronomical unit) away from the Sun. Earth has an atmosphere that helps us survive. The atmosphere is made up of several gases, but mainly 77% nitrogen and 21% oxygen. The average temperature on Earth is 35 degrees Celsius. The Earth's chemical compoosition by mass is 34.6% iron, 29.5% oxygen, 15.2% silicon, 12.7% magnesium, 2.4% nickel, 1.9% sulfer, and 0.05% titanium. The diameter of Earth is 12,756.3 kilometers. It is the only planet with life. The Earth was created by God about 6,000 years ago. It is 197 million square miles, and 70% of the earth is covered in water. The other 30% of Earth is covered by land. The length of the year is 365.25 days long. Its orbit around the Sun is an ellipse. A day on Earth is a little less than 24 hours. The Earth's axis has a tilt of about 23 ½ degrees. It is this tilt which causes the seasons. Earth has several layers. The layers in order are the crust, the mantle, the outer core, and the inner core. Earth has a magnetic field and a magnetic poles. The magnetic axis between the magnetic poles does not have the same tilt as the regular axis The temperature of Earth's core is between 5000 and 7000 degrees Celsius. There are seven continents on earth. They are Antartica, Austrailia, Asia, Europe, North America, South America and Africa. There are five oceans. The oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Arctic Ocean,and Southern Ocean. (Left)The layers of Earth (Middle)The Earth (Right)The Earth's astronomical symbol