water supply

Question 1

What is water?

Answer 1

Natural resource found on Earth in form of salty and fresh

Question 2

What are the three sources of freshwater?

Answer 2

Ice and snow
Rivers and lakes
Groundwater

Question 3

How much of Earth is covered by water?

Answer 3

71%

Question 4

How much water do oceans hold?

Answer 4

97%

Question 5

What is 20% of freshwater?

Answer 5

Groundwater

Question 6

What is the falling of water from the sky?

Answer 6

Rain

Question 7

What is snow?

Answer 7

Precipitation in the form of flakes

Question 8

What is hail?

Answer 8

Big balls of ice that fall from the sky

Question 9

What is sleet?

Answer 9

Small and semitransparent balls of ice

Question 10

What is the water cycle?

Answer 10

movement of water from atmosphere to land and land to atmosphere

Question 11

What does the water cycle start with?

Answer 11

Precipitation

Question 12

What is surface runoff?

Answer 12

rain that falls to ground and flows along the ground

Question 13

What is evaporation?

Answer 13

process where heat from Sun heats up water in river or sea

Question 14

What is transpiration?

Answer 14

process where roots of plants absorb water in ground and transfer water to leaves which in turn release water as water vapour

Question 15

What is condensation?

Answer 15

process when water droplets cool to form clouds

Question 16

What are some reasons for higher demand of water?

Answer 16

Population growth
Agriculture
Industrialization

Question 17

How much % of water is used in households?

Answer 17

7%

Question 18

Why is water essential for agriculture?

Answer 18

It is essential for agriculture because more cultivation means more water is required

Question 19

Why is water essential for industrialization?

Answer 19

Water is needed in power plants in factories for cooling of engines and machinery

Question 20

What is reclamation of water?

Answer 20

Reclamation of water means that sewage water from household and industries can be purified to remove bacteria etc.

Question 21

What is a water catchment area?

Answer 21

Water catchment area is area where all water, sediments and dissolved minerals drain into common outlet

Question 22

What is desalination?

Answer 22

Desalination is removal of salt in seawater through distillation or membrane filtration

Question 23

Distillation method

Answer 23

Distillation method is the method that requires a lot of energy to evaporate seawater

Question 24

Membrane filtration method

Answer 24

Membrane filtration method requires less energy but cost still high for some countries

Question 25

When is biogas produced?

Answer 25

Biogas is produced when organic waste is broken down by bacteria

Question 26

What can biogas be used in?

Answer 26

Biogas can be used in vehicles, cooking and heating purposes

Question 27

How can education help in conservation of water?

Answer 27

Education is one of the best ways to reach out to public and in most countries, conservation form part of school curriculum

Question 28

How can technology help in conservation of water?

Answer 28

Many water-saving devices have been invented to help households and industries to reduce water usage and wastage

Question 29

What is infiltration?

Answer 29

Infiltration is the process of water passing through layers of Earth to groundwater