Which poisonous gas is produced when coal is burnt without enough air supply?
- (A) Ammonia
- (B) Nitrogen
- (C) Hydrogen
- (D) Carbon dioxide
- (D) Carbon dioxide
What is ‘Weathering’?
- (A) Branch of engineering
- (B) Prediction about weather
- (C) Decomposition of rocks
- (D) Braving difficulties
- (C) Decomposition of rocks
About what percentage of the Earth’s land cultivated in the world?
- (A) 11%
- (B) 15%
- (C) 17%
- (D) 20%
- (A) 11%
The basic material that human get from land, sea or air is called:
- (A) Basic resource
- (B) Human resource
- (C) Natural resource
- (D) Environmental resource
- (C) Natural resource
The “World Soil Day” is celebrated on:
- (A) 5th January
- (B) 5th March
- (C) 5th August
- (D) 5th December
- (D) 5th December
Which term is used for several individuals of a species living together in a locality?
- (A) Population
- (B) Eco-system
- (C) Bio-community
- (D) Biosphere
- (C) Bio-community
Which is the most common color in nature?
- (A) Blue
- (B) Green
- (C) Black
- (D) White
- (B) Green
The green color of water in a lake is due to:
- (A) Pollution
- (B) Algae
- (C) Growth of seaweeds
- (D) Sewage waste
- (B) Algae
The element present in the largest amount in rocks and minerals is:
- (A) Carbon
- (B) Silicon
- (C) Hydrogen
- (D) Aluminum
- (B) Silicon
The most abundant metal in the earth’s crust is:
- (A) Zinc
- (B) Iron
- (C) Aluminum
- (D) Copper
- (C) Aluminum