1. HYDROSPHERE
video

2. 2.-How do water from the Earth and Mars differ?
3.-Why does the sea water contain salt?
4.-How the atmosphere affects the existence of water?
1.-What´s the origin of water?
5.-How water is distributed on Earth?

3. 2 3 4 1

5. Liquid water is denser than ice

6. UNIVERSAL SOLVENT

7. Coastal regions have milder climates than inland regions
HIGH HEAT CAPACITY
Coastal regions have milder climates than inland regions
The body loses of its heat when the sweat evaporates

8. SURFACE TENSION

9. CAPILLARITY
activity

10. Plickers

11. Melting point: 0ºC
Boiling point: 100ºC

13. Uses of water Two ways Consumptive use Non-consumptive use
Domestic use
Agricultural
Industrial
Recreactional activities
Energy
Industrial (used as a refrigerator)

14. AGRICULTURE AND LIVESTOCK FARMING
WATER POLLUTION
AGRICULTURE AND LIVESTOCK FARMING
DOMESTIC POLLUTION
INDUSTRIES

15. EUTROPHICATION

16. EUTROPHICATION 1. Phosphates are flushed into rivers and lakes
2.-These pollutants cause aquatic plant growth
3.-Algae blooms, preventing sunlight reaching other plants..
4.-No photosynthesis is possible.
Oxygen in water is depleted.
Dead plants are broken down by bacteria.
5.- Oxygen levels reach a point where no life is possible.
EUTROPHICATION
1.- What happens with phosphates from detergents and fertilizers?
5.-In the end……
3.-Why the green colour in the surface?
2.- What do they provoke in living things?
4.- Why do plants die?

17. Drinking water treatment
Waste water treatment
Drinking water treatment

18. video

19. Biological filtration