Free Environment and Atmosphere MCQs with Answers

161. Places where the temperature of air is above freezing point of the water, the precipitation will be in the form of ________ ?

• A. Hailstorms
• B. Thunders
• C. Rain
• D. Lightning

Explanation: When air near the ground is above 0°C, frozen precipitation usually melts and reaches the surface as rain. Hail can still occur in special thunderstorms, but rain is the intended general answer.

162. Places where the temperature of air is below freezing point of the water, the precipitation will be in the form of __________ ?

• A. Snow
• B. Lightning
• C. Hailstorms
• D. Thunders

Explanation: Below the freezing point, water vapour or ice crystals can reach the ground as snow. Lightning and thunder are associated with storms, not forms of precipitation.

163. What is the third most common gas found in the air we breathe ________ ?

• A. Hydrogen
• B. Neon
• C. Carbondioxide
• D. Argon

Explanation: After nitrogen and oxygen, argon is the third most abundant gas in dry air, making up about 0.93%. Carbon dioxide is much less abundant and continues to vary with emissions and natural processes.

164. In context of environment, the term "dirty dozen" refers to _____?

• A. 12 most harmful greenhouse gases
• B. 12 ozone depleting substances
• C. 12 persistent organic pollutants
• D. None of the above

Explanation: The environmental “dirty dozen” refers to the twelve persistent organic pollutants originally targeted under the Stockholm Convention. These chemicals persist, accumulate in organisms and can travel long distances.

165. The distance of a place South or North of equator is called__________?

• A. Longitude
• B. Latitude
• C. Aptitude
• D. None of these

Explanation: Latitude measures angular distance north or south of the equator, from 0° at the equator to 90° at the poles. Longitude instead measures distance east or west of the prime meridian.

166. Name the animal which can live without water in its entire life?

• A. Desert lizard
• B. Camel
• C. Kangaroo rat
• D. Cuttlefish

Explanation: The kangaroo rat can live without drinking water because it obtains water from seeds and produces additional metabolic water during respiration. Camels conserve water efficiently, but they still drink water when it is available.

167. Hyetology is the study of__________?

• A. High pressure
• B. Rainfall
• C. High temperature
• D. Earthquake

Explanation: Hyetology is the study of precipitation, especially rainfall, including its amount and distribution. The other options concern pressure, temperature or earthquakes rather than precipitation.

168. "Green House Effect" means:____________?

• A. Pollution
• B. Prevention of ultraviolet rays
• C. Trapping of Solar energy due to atmospheric carbon dioxide
• D. D. None

Explanation: The greenhouse effect occurs when gases such as carbon dioxide absorb and re-radiate outgoing infrared heat, warming the lower atmosphere. It is not the prevention of ultraviolet rays.

169. Tropism mostly refers to as_______?

• A. Bird migration
• B. Directional growth of a plant
• C. Longevity of animal species
• D. Behavioral pattern of human

Explanation: Tropism is the directional growth of a plant in response to a stimulus, such as light or gravity. For example, a shoot bends toward light in phototropism.

170. A seed can germinate in the absence of__________?

• A. Oxygen
• B. Light
• C. Moisture
• D. Temperature

Explanation: Many seeds can germinate in darkness because light is not generally required for the initial stages of germination. Oxygen, adequate moisture, and a suitable temperature are normally essential.