The surface of the earth is divided into four inter-connected spheres called "geo-spheres". These are the lithosphere, hydrosphere, biosphere, and atmosphere. Geologists, scientists and researchers discovered and classified life and material on or near the surface of the earth in these four spheres. The four spheres derived its names from the Greek words litho for stone, atmo for air, hydro for water and bio for life.

1. (FOUR SPHERES)
By Prof. Liwayway Memije-Cruz

3. The surface of the earth is divided into four inter-
connected spheres called "geo-spheres".
These are the lithosphere, hydrosphere, biosphere, and
atmosphere. Geologists, scientists and researchers
discovered and classified life and material on or near
the surface of the earth in these four spheres. The four
spheres derived its names from the Greek words litho
for stone, atmo for air, hydro for water and bio for life.

5. the gaseous e
envelope ss
surrounding the e
earth.

6.  the water on or surrounding
the surface of the globe,
including the
water of the oceans
and the
water in
the atmosphere.

7. the solid portion of the earth.

8.  Bio-bubble' part of the earth
and atmosphere that contains life
on ground, in water, and in the
air.