Water: A Precious Resource.

Do you know when the world water day is celebrated ?

• It is celebrated on 12nd March

• It is celebrated on 26th august

• It is celebrated on 22nd March

• It is celebrated 12th april

How much water is Available on Earth

• 90% of the earth’s surface is covered

  with water

• 71% of the earth’s surface is covered

  with water

• 81% of the earth’s surface is covered

  with water

• 70% of the earth’s surface is covered

  with water

Which of these contains the most water?

• a) bones

• b) brain

• c) muscles

Where is most of the Earth's freshwater located?

• In icecaps and glaciers

• In oceans

• in storage tanks

• in ponds

How is Earth's water supply being continuously renewed?

• Through photosynthesis

• Through the water cycle

• Through oceans

Precipitation may ________ into groundwater.

• leak

• fall

• infilterate

Is it possible for groundwater to leave an aquifer?

• yes

• no

• only under certain circumstances

Why can the depth of a water table be high in some places and low in others?

• There is too much leaking occurring in certain spots

• The depth changes due to precipitation, drought, or overuse of wells

• Sedementation occurs

What is irrigation?

• Plowing the fields

• The process of bringing water to an area for use in growing crops

• Bringing groundwater to crops when they are dying

Roughly 20 percent of the water humans use is for agriculture.

• True

• False