50 Earth Facts
1.Earth is known as the “Big Blue Marble.”
2.It is home to over 7 billion humans and a huge variety of animals.
3.Earth has mountains, vast oceans, rivers, and swamps.
4.It is the third planet from the Sun.
5.Earth is about 93 million miles from the Sun.
6.It revolves around the Sun in about 365 days (one year).
7.It is tilted on its axis at 23.5 degrees.
8.It takes just under 24 hours to complete one rotation (one day).
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9.Earth’s diameter is almost 13,000 kilometers.
10.It has one moon that is about one-fourth its size.
11.About 71% of Earth is covered in water and 29% is land.
12.97.5% of Earth’s water is salty, and only 2.5% is fresh water.
13.About 70% of fresh water is frozen.
14.Most remaining fresh water is groundwater, lakes, streams, and swamps.
15.Usable fresh water on Earth is limited.
16.Earth has a thin crust about 50 kilometers thick.
17.The crust is made of large moving plates.
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18.Shifting plates create mountains and deep ocean trenches.
19.Beneath the crust are additional layers, including the lithosphere.
20.Earth has a dense, hot iron core at its center (about 5,200°C).
21.Earth is surrounded by an atmosphere made of gases.
22.The atmosphere is about 78% nitrogen and 21% oxygen.
23.It also contains small amounts of argon, carbon dioxide, methane, water vapor, and neon.
24.The lowest layer of the atmosphere is the troposphere.
25.Weather such as hurricanes, tornadoes, and thunderstorms occur in the troposphere.
26.All of Earth’s features work together to support life.
27.Earth supports life ranging from single-celled organisms to rainforests and insects.
28.Earth is the third planet from the Sun.
29.It is about 93 million miles (150 million kilometers) from the Sun.
30.Earth completes one orbit around the Sun in about 365 days.
31.It takes about 24 hours for Earth to rotate once on its axis.
32.Earth is tilted at 23.5 degrees, which causes the seasons.
33.Earth has one natural satellite—the Moon.
34.The Moon is about one-fourth the size of Earth.
35.Earth’s diameter is about 12,742 kilometers (7,918 miles).]
36.About 71% of Earth’s surface is covered by water.
37.The remaining 29% is land.
38.About 97.5% of Earth’s water is saltwater.
39.Only about 2.5% of Earth’s water is freshwater.
40.Nearly 70% of freshwater is frozen in glaciers and ice caps.
41.Earth’s atmosphere is made up of about 78% nitrogen and 21% oxygen.
42.The atmosphere protects life by blocking harmful solar radiation.
43.Earth has four main layers: crust, mantle, outer core, and inner core.
44.The crust is the thin outer layer where we live.
45.Earth’s core is extremely hot—about 5,200°C (9,392°F).
46.Moving tectonic plates cause earthquakes, volcanoes, and mountains.
47.Earth has a magnetic field that protects it from solar wind.
48.The troposphere is the lowest layer of the atmosphere and where weather occurs.
49.Earth is the only known planet that supports life.
50.Earth formed about 4.5 billion years ago.
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