In water cycle, sun helps water to

  • get clean
  • dry
  • evaporate
  • move in the direction of light

For desalination plant, the first priority is

  • reserves of natural gas
  • reserves of water
  • reserves of oil
  • reserves of coal

Whether we obtain tap water or water from well, it originally comes from

  • sea
  • ocean
  • river
  • rain

Scientists believe that eight out of ten people in under developed countries suffer from diseases due to

  • polluted water
  • bacterial food
  • contaminated food
  • salty water

Trachoma is caused due to the presence of

  • insects
  • bacteria
  • viruses
  • parasites

The reason for presence of water underground is

  • oceans make tunnels due to high water pressure
  • due to salt in water, it starts making space in the soil for movement
  • some of the rain water is soaked into soil
  • rivers eventually run underground

The largest sea on the earth is

  • Arabian sea
  • South China sea
  • Mediterranean sea
  • Dead sea

Ice flows down the mountainside like a slow moving rive is called

  • ice cap
  • snow river
  • glacier
  • snow peak

For drinking, distilled water is

  • suitable
  • not suitable
  • poisonous
  • not preferable

In country area, untreated sewage is pumped into tanks known as

  • septic tanks
  • sewage tanks
  • grit tanks
  • sludge tanks

The removal of particles settled at the bottom of a tank is called

  • coagulation
  • sedimentation
  • filtration
  • chlorination

In snowy regions, most of the fresh water is in the form of

  • vapors
  • snow
  • ice
  • all of above

Untreated sewage should not be pumped into

  • water tanks
  • water reservoirs
  • rivers and streams
  • oceans

The water bodies smaller than oceans are known as

  • lakes
  • ponds
  • seas
  • rivers

The disease formed due to the drinking of water containing bacteria and viruses is known as

  • water-borne diseases
  • water-washed diseases
  • water-related diseases
  • anti-water diseases

When people do not have enough water for washing hands and body, a disease is spread. This disease is known as

  • water born disease
  • water washed disease
  • water related disease
  • anti water disease

The maximum percentage of water in a plant or animal is

  • 0.99
  • 0.75
  • 0.8
  • 0.5

As compare to water, pesticides and insecticides have

  • higher boiling point
  • lower boiling point
  • equal boiling point
  • extremely high boiling point

The soil and sand is settled at the bottom in

  • metal screen
  • grit tank
  • sludge tank
  • filter bed

Crops grow well when they are

  • fertilized
  • irrigated
  • cared
  • wilted

If we don't drink water, we will eventually

  • get dry
  • get wet
  • die
  • get hydrated

Desalinated and distilled water is mostly used in

  • North America
  • South America
  • Middle East
  • East Asia

In best water treatment works, water is pumped from

  • lakes
  • rivers
  • oceans
  • reservoirs

A food item which is wasted most, is

  • meat
  • vegetables
  • grains
  • water

The water we use comes from

  • rain and ice
  • rain and seas
  • oceans and rivers
  • all of above

Pesticides make the river water

  • poisonous
  • saltish
  • hot
  • sweet

Most of the reservoirs are built on

  • roofs
  • lowlands
  • mountains and high lands
  • sea beds

The largest ocean covers about

  • half of the surface of earth
  • quarter of the surface of earth
  • one-third of the surface of earth
  • one-fifth of the surface of earth

As compare to normal water the concentration of oxygen in hot water is

  • low
  • high
  • same
  • equal

Water of oceans and seas is

  • sour
  • bitter
  • sweet
  • salty
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