ENVIORNMENT AND EARTH SCIENCES (MCQs)

Which is the second most abundant metal in the earth’s crust?

• (A) Zinc
• (B) Iron
• (C) Aluminum
• (D) Copper

Percentage of water on Earth surface is about:

• (A) 51%
• (B) 61%
• (C) 71%
• (D) 81%

Suspended particles from drinking water are removed by:

• (A) Table salt
• (B) Potash alum
• (C) Charcoal
• (D) Chlorine

What percentage of Earth’s water supply is fresh water?

• (A) 3%
• (B) 6%
• (C) 10%
• (D) 15%

The percentage of water in ocean is:

• (A) 90%
• (B) 93%
• (C) 97%
• (D) 99%

Which one is NOT the source of water pollution?

• (A) Fertilizers
• (B) Rain water
• (C) Industrial wastes
• (D) Human wastes

What percentage of Earth’s water is for human use?

• (A) 0.014%
• (B) 0.222%
• (C) 0.314%
• (D) 0.456%

What percentage of Earth’s water is frozen in glaciers?

• (A) 1.000%
• (B) 1.984%
• (C) 2.673%
• (D) 3.500%

About what percentage of the Earth’s surface is land?

• (A) 21%
• (B) 29%
• (C) 31%
• (D) 39%

The main cause of floods in the rivers is:

• (A) Heavy snowfall
• (B) Earthquakes
• (C) Deforestation
• (D) Construction of dams