IF IN

THE E

ARTH T

HERE ARE

ALWAY

S THE S

AME

QUANTITY

OF W

ATER T

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IS FO

LLOW

ING T

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LE,

WHY

WE S

AVE IT

?

• NÚRIA GÁLVEZ

• TEO VIZUETE

• MAHAMADOU SUMBUNDU

• CLAUIDA GARCIA

HYDROSPHERE

• The hydrosphere in physical geography describes the combined mass of water found on, under, and over the surface of a planet.

• In the planet  there are 1386 million cubic kilometers of water on earth. This includes water in liquid and frozen forms in groundwater's, glaciers, oceans, lakes and streams. Saline water account for 97.5% of this amount. 

THE WATER CYCLE

• The hydrological cycle transfers water from one state or reservoir to another. Reservoirs include atmospheric moisture (snow, rain and clouds), oceans, rivers, lakes, groundwater, subterranean aquifers, polar icecaps and saturated soil. 

HOW MUCH WATER ARE ON THE EARTH

• The Earth is a watery place. But just how much water exists on, in, and above our planet? About 70 percent of the Earth's surface is water-covered, and the oceans hold about 96.5 percent of all Earth's water. But water also exists in the air as water vapor, in rivers and lakes, in icecaps and glaciers.

EXPERIMENT 1

1. Assemble the instrument that we use.2. Put the water into the burette.3. After five minutes we see that inside the vessel of

precipitates there are 12 ml.

EXPERIMENT 2

1. Cut the bottle to the bottom.2. PESAR the beaker without water.3. PESAR the beaker with water.4. PESAR the beaker with water mixed with soil .5. PESAR the beaker with water mixed with other soil.

REASONS FOR SAVING WATER

• We spend a lot of water

• When the water seeps into the ground, all of the water don’t arrive to the sea.

• Not all the countries rain the same quantity of water.

• In this society we have many factories and we also have washing machines

THE END!