MCQ Questions

Chapter

Question No. 1

Fill in the Blanks:

Answer :

(a) PCBs are man made chemicals used in many industries ______________________

(b) Both mercury and PCBs settle on the ground and in the water ___________________.

(d) Some fish are being fished in the wild so much that they cannot ____________________.

Question No. 2

True or False

Answer :

(a) There are many types offish which are good for us.

(b) Only water pollution results in some fish contain harmful chemicals.

(d) Neither mercury nor PCBs can attach themselves to particles when released in the air.

Question No. 3

Answer the following questions.

Answer :

(a) Due tow hat reason do some fish might contain harmful chemicals?

(b)That happens when polychlorinated biphenyls and mercury are released into theair?

(d) State the reasons why some fish are becoming extinct.

Question No. 4

Water pollution is very harmful to humans, animals and

Answer :

plant life

water life

sea life

natural life

Question No. 5

Mercmy is a toxic chemical, which occurs naturally in oceans and the

Answer :

earth's crus

sea bed

mountains

forest

Question No. 6

PCBs were released or leaked into the air and water and have been transported around the

Answer :

planet

earth

world

globe

Question No. 7

Some fish may contain harmful chemicals, which can be the result of both natural causes and

Answer :

water pollution

man-made pollution

biographical hazards

physical distinction

1 2 3 4 5 6 7

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