Our Environment

Question 1

Question: A natural phenomenon that becomes harmful due to pollution is _____________.

1.	global warming
2.	ecological balance
3.	greenhouse effect
4.	desertification

Answer: 3

Question 2

Question: The pollutant responsible for ozone holes is ____________.

1.	CO2
2.	SO2
3.	CO
4.	CFC

Answer: 4

Question 3

Question: One of the best solutions to get rid of non-biodegradable wastes is _________________.

1.	burning
2.	dumping
3.	burying
4.	recycling

Answer: 4

Question 4

Question: Animal dung is _________________ waste.

1.	biodegradable
2.	non-biodegradable
3.	hazardous
4.	toxic

Answer: 1

Question 5

Question: Which of the following is biodegradable?

1.	iron nails
2.	plastic mugs
3.	leather belts
4.	silver foil

Answer: 3

Question 6

Question: Which of the following is non-biodegradable?

1.	animal bones
2.	nylon
3.	tea leaves
4.	wool

Answer: 2

Question 7

Question: Name one non-biodegradable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.

1.	DDT
2.	CFC
3.	Radioactive substances
4.	PAN

Answer: 3

Question 8

Question: In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?

1.	small fish
2.	microscopic animals
3.	big fish
4.	water birds

Answer: 4

Question 9

Question: Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs.

1.	CFC
2.	PAN
3.	DDT
4.	PAC

Answer: 3

Question 10

Question: Name the process in which a harmful chemical enters the food chain and gets concentrated at each level in the food chain.

1.	concentration
2.	biomagnification
3.	expansion
4.	pollution

Answer: 2