m

1. THE HYDROSPHERE

2.  The Hydrosphere includes all the water on Earth.
 Water covers 71% of the Earth's surface.
 Living things contain water in their bodies in
different proportions:

 Humans: 70%.
 Jellyfish: 99,5%
 Cat: 60%
 Orange: 85%

3. Do you know……..?
 Where can we find water in our planet?
 How is sea water different to water in rivers?
 What is the water cycle?
 Why is important not to waste water?
 Some easy ways to save water?

4. WHERE IS WATER ON THE
EARTH?

6. WHERE IS THERE WATER ON EARTH?
 97% of water on Earth is salt water. It is found in
the oceans.
 3% of water on Earth is fresh water. It is found in:
 Ice and snow from glaciars.
 Below the surface: groundwater.
 In the atmosphere.
 On the surface of our planet.
 In living beings.

7. LAS PROPIEDADES DEL AGUA
 La molécula de agua está formada por tres átomos: dos
de hidrógeno y uno de oxígeno.
 El agua es incolora, inodora e insípida.
 El agua es un gran solvente (muchas sustancias se
disuelven en ella).
 El agua existe en tres estados físicos: sólido, líquido y
gaseoso.
 La densidad del agua es máxima a 4 ºC.

8. • El agua se congela a 0ºC, y se evapora a 100 ºC.
• El agua modera los cambios de temperatura.
• El agua se adhiere a las superficies (adhesión).
• Las moléculas de agua se unen con fuerza entre
ellas (cohesión).

9. THE ROLE OF WATER IN LIVING THINGS
 Water is the main component in living
things.
 Many living things live in water.
 Chemical reactions in our body occur in
water.
 Water maintains our body temperature
constant.

10. NATURAL DISASTERS
FLOODS
DROUGHTS

11. WATER CONSUMPTION

14. WATER POLLUTION

16. THE WATER CYCLE
http://www.iesmariazambrano.org/Departamentos/flash-educativos/ciclo_agua.swf

17.  Is the movement of water around, over and through
the Earth. It consist on these processes:
 Evaporation.
 Evapotranspiration.
 Condensation.
 Precipitation.
 Surface Runoff.
 Infiltration

18.  Evaporation: liquid water changes to gas. Water
passes from the hydrosphere to the atmosphere.

19.  Evapotranspiration: water evaporates from the
leaves of plants.

20.  Condensation: Water vapour changes to liquid,
forming clouds.

21.  Precipitation: water in the clouds falls to the
ground.

22.  Surface Runoff: surface water moves across the
land, forming rivers and streams.

23.  Infiltration: surface water filters into the
ground, using the pores in the rocks.

26. El Modelado del Relieve por el Agua
http://www.edistribucion.es/anayaeducacion/8420534/U09/U09_01_EPI_04/v
ideo_modelado_paisaje.html
Las Aguas Contaminadas
http://www.edistribucion.es/anayaeducacion/8420534/U09/U09_01_EPI_05/
video_9_5_nb/index.html