Science State Std 8 L No.8 Pollution

Front 1

Indiscriminate

Back 1

haphazard or random

Front 2

haphazard

Back 2

marked by lack of plan, order or direction

Front 3

Contaminate

Back 3

to make unfit for use by the introduction of wholesome or undesirable elements

Front 4

Pollutant

Back 4

something that pollutes,

a foreign substance that

makes something impure

or dirty, contaminant

Front 5

Pollution

Back 5

making environment dirty or

harmful

Front 6

degradable

Back 6

a reduce in quality or reduction

in a chemical substance into

less complex form

Front 7

depletion

Back 7

to lessen makedly in quantity ,

content power or value

Front 8

effluent

Back 8

waste material discharged into

the environment especially

when serving as a pollutant

or flowing out

Front 9

toxic

Back 9

containing or being poisonous

material especially when capable

of causing death

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ecosystem

Back 10

the complex of a community of organisms and its environment functioning as a ecological unit

Front 11

ecological

Back 11

of or relating to the environments

of a living things and their environments.

Front 12

Prolonged

Back 12

Continuing for a notably long time

Front 13

leaching

Back 13

to remove harmful or nutritive elements from soil by percolation

Front 14

acid rain

Back 14

rain that has increased acidity

caused by environmental

factors ( such as atmospheric pollutants)

Front 15

hemp

Back 15

a tall widely cultivated Asian

herb that is cultivated for

it's tough vast fiber and

edible seeds and oil

Front 16

pesticide

Back 16

an agent used to destroy pests

Front 17

biotic

Back 17

relating to living organisms

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perceive

Back 18

to attain awareness

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eruption

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the breaking out of

Front 20

irritate

Back 20

to provoke impatience

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retard

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deceleration, slow development

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global

Back 22

relating to the entire world, worldwide

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glacier

Back 23

a large body of ice moving down a slope

Front 24

iceberg

Back 24

a floating mass of ice detached from glacier

Front 25

stink

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a strong , offensive odour

Front 26

offensive

Back 26

aggressive

Front 27

tanning

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to convert into leather

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suspend

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to hang so as to be free on all sides

Front 29

sludge

Back 29

a muddy deposit

Front 30

nematode

Back 30

elongated cylindrical worm

Front 31

ailments

Back 31

a bodily disorder or chronic disease

Front 32

deform

Back 32

to spoil the form of

Front 33

weed

Back 33

one that tends to overgrow and of no value