Atmosphere & Weather — Set 4
Geography · वायुमंडल और मौसम · Questions 31–40 of 60
Lines on a map joining places of equal temperature are called?
Correct Answer: B. Isotherms
Isotherms are lines connecting points having the same temperature at a given time. They help in visualizing temperature distribution across a region. The spacing of isotherms indicates the temperature gradient.
Which instrument is used to measure atmospheric pressure?
Correct Answer: B. Barometer
A Barometer is used to measure atmospheric pressure. Common types include mercury and aneroid barometers. A rapid drop in barometric pressure often indicates an approaching storm.
The 'Roaring Forties' are strong westerly winds found in?
Correct Answer: A. The Southern Hemisphere
Roaring Forties are strong westerly winds found between 40 and 50 degrees latitude in the Southern Hemisphere. Their strength is due to the lack of landmass to slow them down. Sailors used these winds to speed up their travel.
The local wind 'Loo' is a characteristic feature of summers in?
Correct Answer: B. Northern India
Loo is a strong, hot, and dry summer wind. It blows over the western Indo-Gangetic Plain region of North India and Pakistan. Exposure to it can cause heatstroke.
Which cloud type is often described as looking like 'cotton wool'?
Correct Answer: A. Cumulus
Cumulus clouds look like fluffy, white cotton wool or cauliflower. They have a flat base and distinct outlines. They usually indicate fair weather unless they grow vertically into storm clouds.
The normal lapse rate of temperature in the troposphere is approximately?
Correct Answer: D. 6.5°C per km
The normal lapse rate is the decrease of temperature with altitude, which is about 6.5°C per kilometer (or 1°C per 165 meters). This occurs because the troposphere is heated from the ground up. Variations in this rate can lead to stability or instability in the atmosphere.
Which layer of the atmosphere allows for the flight of jet aircrafts to avoid weather disturbances?
Correct Answer: A. Lower Stratosphere
Jet aircraft often fly in the lower stratosphere to avoid turbulence and weather found in the troposphere. This layer is relatively calm and free of clouds. It provides a smoother ride and better fuel efficiency.
The term 'Isohyet' refers to lines on a map connecting places with equal?
Correct Answer: C. Rainfall
Isohyets connect points that receive equal amounts of rainfall during a given period. They are essential for analyzing precipitation patterns. Maps with isohyets are used in agriculture and water resource planning.
Which wind blows from the sea to the land during the day?
Correct Answer: C. Sea Breeze
Sea Breeze occurs during the day. Land heats up faster than the sea, creating low pressure over land. Cool air from the sea blows towards the land to replace the rising warm air.
The primary cause of the Coriolis force is?
Correct Answer: C. Earth's rotation
The Coriolis force is an inertial force caused by the Earth's rotation on its axis. It affects the direction of winds and ocean currents. It is zero at the equator and maximum at the poles.