Geography PYQ 2011- 2015
1 / 10
Normally, the temperature decreases with the increase in height from the Earth’s surface, because
1. the atmosphere can be heated upwards only from the Earth's surface 2. there is more moisture in the upper atmosphere 3. the air is less dense in the upper atmosphere
Select the correct answer using the codes given below:
Atmosphere is heated by infrared radiation, Moisture is more in lower atmosphere. In the upper atmosphere Air is less dense which hold less heat thus temperature is low
2 / 10
Consider the following factors:
1. Rotation of the Earth 2. Air pressure and wind 3. Density of ocean water 4. Revolution of the Earth
Which of the above factors influence the ocean currents?
1. Rotation of the Earth 2. Air pressure and wind 3. Density of ocean water. Revolution has no impact on ocean currents.
3 / 10
Which of the following is/are cited by the scientists as evidence/evidences for the continued expansion of the universe?
1. Detection of microwaves in space 2. Observation of redshift phenomenon in space 3. Movement of asteroids in space 4. Occurrence of supernova explosions in space
The cosmic microwave background (CMB) is the thermal radiation left over from the "Big Bang". The CMB is well explained as radiation left over from an early stage in the development of the universe and its discovery is considered a landmarks test of the Big Bang model of the universe. Red shift and Blueshift describes how light changes as objects in space (such as stars or galaxies) move closer or farther away from us. The concept is key to charting the universe's expansion.
4 / 10
The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation?
1. There are no clouds or water vapour in the lower stratosphere. 2. There are no vertical winds in the lower stratosphere.
Which of the statements given above is/are correct in this context ?
Jet fly in the lower stratoshpere to avoid the turbulence. There are no clouds and the air is dry with little water vapour. There are no vertical winds in the lower stratosphere.
5 / 10
What could be the main reason/reasons for the formation of the African and Eurasian desert belt ?
1. It is located in the sub-tropical high-pressure cells. 2. It is under the influence of warm ocean currents.
It is under the influence of cold ocean current. So given second statement is wrong.
6 / 10
Westerlies in the southern hemisphere are stronger and persistent than in the northern hemisphere. Why ?
1. The southern hemisphere has less landmass as compared to the northern hemisphere. 2. Coriolis force is higher in the southern hemisphere as compared to the northern hemisphere.
Which of the statements given above is/are correct?
The speed of these winds is higher and persistent in the southern hemisphere. The land mass in the southern hemisphere is lesser in comparison to the northern hemisphere. As these winds cross the landmass, their velocity decreases. Thus, the effect of westerlies is less over the northern hemisphere than in the southern hemisphere.
7 / 10
What is the difference between asteroids and comets ?
1. Asteroids are small rocky planetoids, while comets are formed of frozen gases held together by rocky and metallic material. 2. Asteroids are found mostly between the orbits of Jupiter and Mars, while comets are found mostly between Venus and Mercury. 3. Comets show a perceptible glowing tail, while asteroids do not.
Comets found beyond Nepture i.e. kupier belt. Asteroids are tiny planetary bodies revolving around the sun between the orbits of Jupiter and Mars. Comets are made up of small icy particles and Meteoric fragments
8 / 10
La Nina is suspected to have caused recent floods in Australia. How is La Nina different from El Nino?
1. La Nina is characterized by unusually cold ocean temperature in equatorial Indian Ocean whereas El Nino is characterized by unusually warm ocean temperature in the equatorial Pacific Ocean. 2. El Nino has adverse effect on south-west monsoon of India, but La Nina has no effect on monsoon climate.
EI Nino -EI Nino is the warming of the Pacific Ocean between South America and the Data Line. -It accompanies high air surface pressure in the western Pacific. - EI Nino occurs when tropical Pacific Ocean trade winds die out and ocean temperatures become unusually warm.
La Nina - La Nina exists when cooler-than-usual Ocean temperatures occur on the equator between South America and the Data Line. - It accompanies low air surface pressure in the eastern Pacific. -La Nina, which occurs when the trade winds blow unusually hard and the sea temperature becomes colder than normal.
9 / 10
A layer in the Earth’s atmosphere called ionosphere facilities radio communication. Why ?
1. The presence of ozone causes the reflection of radio waves to earth. 2. Radio waves have a very long wavelength.
Statement 1 is wrong; the ionosphere contains charged particles, so electromagnetic radio waves get reflected, and communication becomes possible. Ozone is found mainly in the stratosphere and in traces in the troposphere. Its main function is the absorption of UV rays. While the ions give the ionosphere its name, it is the free electrons that effect the radio waves and radio communications. Also Radio waves have the longest wavelength in the EM spectrum.
10 / 10
If a tropical rain forest is removed, it does not regenerate quickly as compared to a tropical deciduous forest. This is because
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