1. Liquid Water on the surface
2. Oxygen Rich Atmosphere
3. Stable axis tilt due to large natural satellite (moon)
4. life
The Sun, Earth and other planets, along with many other items are part of a Solar System.
85% of all plants on the earth live under the sea! Most plants grow from seeds!
Other planets other than earth is put in the solar system for humans to explore and do researches on them.
earth has living creatures on it......obviously
No. The metric system (and the Imperial system and any other system like them) is a system of measurement. In so far as all living things occupy a volume, have a mass and experience time, the system measures characteristics that living things experience but these are not, in themselves, characteristics of the living things.
Some common characteristics of all plants are that they contain a cell wall. Other characteristics are making their own food and that plants contain a cuticle.
Earth has life on it.
It doesn't; Earth has many other gasses. Our atmosphere is mostly nitrogen; only about 21% is oxygen. It may be that you intended to ask, why does only Earth have free oxygen in its atmosphere, while other planets in the solar system don't. Free oxygen is produced by green plants (by a process called photosynthesis) and green plants grow only on Earth.
If you mean a breathable atmosphere, then only the Earth. Other plants in our solar system have atmospheres too toxic to exist in.
pow
How are the major parts of the earth system related to each other
...only as a metaphor. The Earth is a planet that is in the Milky Way galaxy. The Earth is not a galaxy. No, the Earth is a planet which orbits the Sun (which is a star) along with several other plants, this is called the solar system. Our Sun and its planets along with millions of other stars form a galaxy called The Milky Way.
Earth does a lot of the water. It supports plants, animals, humans and soil
In our solar system, there is no moon that has an atmosphere which resembles that of the Earth. Note that the oxygen content of the Earth's atmosphere is the result of photosynthesis performed by green plants, and there is no other place in the solar system that has green plants (or any other kind of life that has yet been discovered). It remains theoretically possible and perhaps even likely that there are planets and moons elsewhere in the galaxy which have atmospheres resembling that of the Earth, but they have not actually been detected, and considering the great distances involved, perhaps they never will be.
The aspect of geography that examines physical characteristics of the Earth is known as Geology. It focuses on the composition, structure, dynamics and other physical related aspects of Earth.
common characteristics
other than plants and animals? you mean human beings?