Which is the softest substance available on earth?
- (A) Sapphire
- (B) Ruby
- (C) Talc
- (D) Coal
- (C) Talc
Most weather conditions happen in which layer?
- (A) Mesosphere
- (B) Troposphere
- (C) Stratosphere
- (D) Thermosphere
- (B) Troposphere
Troposphere start at Earth’s surface and goes up about:
- (A) 4 km to 6 km
- (B) 6 km to 8 km
- (C) 8 km to 12 km
- (D) 8 km to 16 km
- (C) 8 km to 12 km
Which of the following is the rarest gas in the air?
- (A) Neon
- (B) Helium
- (C) Oxygen
- (D) Hydrogen
- (A) Neon
Which element is known as the “Earth maker”?
- (A) Oxygen
- (B) Carbon
- (C) Silicon
- (D) Hydrogen
- (C) Silicon
Which of the following gases does NOT pollute air?
- (A) Carbon Dioxide
- (B) Carbon Monoxide
- (C) Sulfur Dioxide
- (D) Nitrogen Dioxide
- (D) Nitrogen Dioxide
A person who studies rocks and soils is a:
- (A) Botanist
- (B) Geologist
- (C) Archaeologist
- (D) Geophysicist
- (B) Geologist
The study of weather conditions is known as:
- (A) Physiology
- (B) Geography
- (C) Meteorology
- (D) Demography
- (C) Meteorology
The study of inter-relationship between the various organisms and their relationship with physical environment is called:
- (A) Ecology
- (B) Eco-system
- (C) Biology
- (D) Ecological balance
- (A) Ecology
The humidity in the air tells us about the ratio of ______ in the air.
- (A) Oxygen
- (B) Carbon dioxide
- (C) Water vapors
- (D) Dust particles
- (C) Water vapors