Water - The Most Important Liquid in the World

Water is the most important liquid we know. It is everywhere we look. Water is in the ground and in the air that we breathe.

All animals, plants and humans need water to survive. Water has formed our earth since its eginning. It also prevents the earth from becoming too hot or too cold. Water never disappears. We use the same water over and over again.

Contents : 8  pages

• Chemistry of water
• Water in our daily lives
• Water and the human body
• World water supply
• Water cycle
• Water treatment
• Exercises
• Key

Downloadable Sample of the Full Module (Not Printable) :

• Water - Text  (PDF  275 KB)
  
• Water - Exercises  (PDF  125 KB)