Question

What is maths?
What is history?
What is soil?
Water management means what?
7×[8+5]=?
What is meant by water pollution?
What is meant by air pollution?
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Answer 1

Answer:

hi mate

Explanation:

Maths :

   Maths includes the study of such topics as quantity,structure,space and change. It has no generally accepts definition.

History:

       History is the past as it is described in written documents and the study therefore.Events occuring before written records are considered prehistory.

Soil:

     Soil is a mixture of organic matter,minerals,gases,liquids and organisms that together support life.

Water management:

     Water management is the activity ofplanning,developing,destributing,

and optimum use of water resources under defined water polices and

regulations.

solution:

     7x[8+5]

= 7x13

=91

Water pollution:

  Water pollution is the contamination of water bodies,usually as a result of human activities. Water bodies includes for example lakes,rivers,oceans,aquifer and groundwater.

Air pollution:

  Air pollution means the air contains of dust,chemials etc.

 

Answer 2

Answer:

Whenever substances such as sewage, toxic chemicals, silt, etc., which are harmful to life, get mixed with water, the water is said to be polluted.