Earth is the only planet so far to contain life. It has abundant oxygen and water. Right amount of greenhouse gases trap heat within the earth for the right temperature for life. The Earth’s geomagnetic field shields us from solar storms as well as cosmic waves. Earth’s partially molten iron core forms the geomagnetic field. The layers of atmospheric gases which stretch out to the great divide between Earth and space also act as a shield for earth by producing friction which burn out meteors and other space matter heading our way.
Earth is divided into the Lithosphere consisting of rocks, the Hydrosphere consisting of water, the Atmosphere, consisting of air, and the Biosphere, consisting of all the living organisms. Earth is also the only planet we know that has plate tectonics which act as a recycle bin for the Lithosphere. Occasionally, we see eclipses on Earth. It is actually due to the blocking of sunlight by the moon along its orbit around earth.
Geography:
Abundant life and distinct eco-systems.
Has plate techtonics
Possess a large variety of geographical features
Oceans, ridges, mountains, hills, canyons, deserts, savannas, rainforests, soil etc
Anatomy:
A core, mantle and crust
Many eco-systems
Divided into many spheres: Lithosphere (rocks), Hydrosphere (water), Biosphere (life) and Atmosphere (air).
Chemical composition:
Abundant oxygen of biological origins (plants) and water
Has a variety of elements, including metallic and non-metallic ones. A total of 118.
A magnetic field formed from the semi-molten iron core. Protects Earth from the Solar wind from the sun
Shape
Sphere
Climate:
Substantial greenhouse gases to trap sufficient sun’s heat to support abundant life
An oasis in our solar system
Abundance of water to support life
Mild warmth and pleasant weather throughout
Different climate in different parts
Chemical composition:
An semi-molten iron core of roughly 3000km.
A semi-molten mantle of molten rocks and other materials
