Earth
What does the name
“Earth” mean?
The name “Earth” comes from the Old English word “eorþe”, which simply means “eorþe”, “soil” or “ground”. Unlike other planets named after gods, the name of our planet is not associated with mythological characters, but reflects its physical nature.
Facts about
the earth
The Earth has one natural satellite, the Moon, which has a significant influence on the tides.
Earth is the only known planet on which life exists. Also, 70% of its surface is covered with water.
The Earth's core, made up of iron and nickel, is very hot, with temperatures there reaching over 5,000 degrees.
The structure of the earth
1. Earth's crust(40km)
2. Mantle(2900km)
3. Outer core(2250km)
4. Inner core(1300km)
Exosphere
700 - 200 000км
Thermosphere
90 - 700км
Mesosphere
50 - 80км
Stratosphere
12 - 50км
Troposphere
0 - 12км
The Moon
The Moon is Earth's only natural satellite and the fifth largest in the Solar System. The average distance between the Moon and the Earth is 384,403 kilometers. The diameter of the Moon is 3,476 kilometers. It was formed about 4.5 billion years ago, later than the formation of the Earth.
Features
of the earth
Presence of life
Earth is the only known planet on which life exists in all its diversity.
Liquid water
About 70% of the Earth's crust is covered by liquid water.
Atmosphere
Earth has an atmosphere containing about 21% oxygen.
Map of the earth's surface
Photo of the earth from the ISS