EARTH
SCIENCE
Grade 11
Julia Mae A. Savarez
, 05 Water Resources
Introduction
Earth is the blue planet. Water is a vital need for human and is used in
human modernization. Water is the world’s major resources and it
compromises over 70% of the earth surface. The total amount of water
on earth has remained constant through the years because of the
water cycle.
DISTRIBUTION Surface
Freshwater Water Freshwater
3% 1%
Groundwate
r
30%
Saltwater
Glacier
97% 69%
SURFACE WATER
Streams
Bodies of water that is constant in motion
River
Largest type of stream
Ponds
Smaller bodies of water without any outlets