Atmosphere & Weather — Set 5
Geography · वायुमंडल और मौसम · Questions 41–50 of 60
Which gas is the most abundant in the Earth's atmosphere?
Correct Answer: A. Nitrogen
Nitrogen is the most abundant gas, making up about 78% of the atmosphere. It is essential for life and acts as a diluent for oxygen. Oxygen acts as the second most abundant gas.
Which is the second most abundant gas in the Earth's atmosphere?
Correct Answer: C. Oxygen
Oxygen is the second most abundant gas, constituting about 21% of the atmosphere. It is vital for respiration in most living organisms. It also supports combustion.
Which is the coldest layer of the Earth's atmosphere?
Correct Answer: D. Mesosphere
The Mesosphere is the coldest layer. Temperatures here can drop as low as -90°C (-130°F). It lies between the stratosphere and the thermosphere.
Which layer of the atmosphere is also known as the 'upper atmosphere' where satellites orbit?
Correct Answer: A. Thermosphere/Exosphere
Satellites typically orbit in the Thermosphere and Exosphere. The air density here is extremely low. The International Space Station orbits within the thermosphere.
A 'Wind Vane' is used to measure?
Correct Answer: D. Wind Direction
A Wind Vane measures the direction from which the wind is blowing. It usually has an arrow that points into the wind. It is one of the oldest weather instruments.
Which instrument is used to measure relative humidity?
Correct Answer: A. Hygrometer
A Hygrometer is used to measure the amount of water vapor in the air. Common types include the hair hygrometer and the psychrometer. It is crucial for weather forecasting.
High altitude clouds that look like feathery wisps are called?
Correct Answer: D. Cirrus
Cirrus clouds are high-altitude clouds composed of ice crystals. They appear delicate, feathery, or wispy. They often indicate a change in weather.
Lines on a map connecting places of equal atmospheric pressure are called?
Correct Answer: D. Isobars
Isobars connect points of equal atmospheric pressure. Closely spaced isobars indicate strong winds. Widely spaced isobars indicate calm weather.
The local wind 'Mistral' is known for being?
Correct Answer: C. Cold
Mistral is a strong, cold, northwesterly wind. It blows from southern France into the Gulf of Lion in the northern Mediterranean. It is most common in winter and spring.
Which of the following is a 'Planetary Wind'?
Correct Answer: A. Trade Wind
Trade Winds are planetary or permanent winds. They blow consistently in the same direction throughout the year. Sea breezes and Monsoons are periodic or seasonal winds.