Spheres

Biosphere
Hydrosphere
Lithosphere
Atmosphere 

Biosphere 
The biosphere also known as the ecosphere, is the worldwide sum of all ecosystems. It can also be termed the zone of life on Earth, a closed system, and largely self-regulating.


Hydrosphere 
The hydrosphere is the liquid water component of the Earth. It includes the oceans, seas, lakes, ponds, rivers and streams. The hydrosphere covers about 70% of the surface of the Earth and is the home for many plants and animals.


Lithosphere 
A lithosphere is the rigid, outermost shell of a terrestrial-type planet, or natural satellite, that is defined by its rigid mechanical properties

Atmosphere 
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body

1. How much of the earth is made up by hydrosphere? 70%
2. How much of the earth is made up by lithosphere / ground? 30%
3. What is the atmosphere made up of? 78% nitrogen/ 21% oxygen 
4. What does the biosphere contain? All aspects of life