The document discusses the Earth's division into four interconnected spheres: lithosphere, hydrosphere, biosphere, and atmosphere, each named after Greek words. It highlights how these spheres encompass the solid Earth, water bodies, air, and life forms. Geologists and researchers categorize materials and life based on these spheres.

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.