World & Physical Geography MCQs

Notes:
Saturn is the least dense, while earth is most dense among all the planets. Its density is less than that of water. The average density of the planets in decreasing order is given below.

Planet	Average Density (gm/cm3)
Earth	5.5
Mercury	5.4
Venus	5.2
Mars	3.9
Neptune	1.6
Jupiter	1.3
Uranus	1.3
Saturn	0.7

Notes:
The Kepler Mission is specifically designed to survey the Milky Way galaxy to discover hundreds of Earth-size and smaller planets. It is to find out habitable zone and determine the fraction of the hundreds of billions of stars in our galaxy that might have such planets.

Notes:
Arete,Cirque, Groove, Moraines, Flood planes are the landforms associated with the erosion acitivity. It means weathering mainly.

Notes:
Milwaukee Deep is located in the Puerto Rico Trench and is known as the deepest part of the Atlantic Ocean. It was named after the USS Milwaukee, the ship that first discovered it. Deep ocean trenches like the Puerto Rico Trench are formed by the geologic process of subduction, where one tectonic plate is forced under another.

Notes:
The McMurdo Dry Valleys, renowned for their hypersaline lakes like Lake Vanda with a striking salinity of over 35%, which is 10 times more than typical ocean water, are located in Antarctica. Despite this, the most saline water body globally is not found here but at the Gaet’ale Pond. This site, situated in the Danakil Depression in Afar, Ethiopia, holds an even higher concentration of salt, accurately representing the diversity of extreme environments on Earth.

Notes:
Venus has surface temperatures over 400 °C and it is the hottest planet of Solar system , most likely due to the amount of greenhouse gases in the atmosphere.

Notes:
Local winds are winds that blow in a limited area and are influenced by local geography. They can blow between small low and high pressure systems. Some examples of local winds include:

• Sea breezes: These winds alternate with land breezes during periods of strong daytime warming or nighttime coolness.
• Loo: These hot and dry winds blow during summers in the northern plains of India.
• Chinook winds: These warm and dry winds move towards the eastern slopes of rocky mountains.

Other types of local winds include:

• Anabatic and katabatic winds
• Foehn winds

Local winds can be dominated by wind patterns when broad-scale winds are weak.

Notes:
Temperatures can reach lows of -90 degrees Celsius in the mesosphere, making it the coldest layer of the earth's atmosphere. The mesosphere extends above the stratosphere and ranges from 50 km to 87 km above the surface.  

Notes:
In the case of Laos, this disadvantage is strikingly apparent, as Laos is the only landlocked country in the whole of Southeast Asia. Asia has 12 landlocked countries: Afghanistan, Armenia, Azerbaijan, Bhutan, Laos, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Tajikistan, Turkmenistan, and Uzbekistan.

Notes:
Alexander Island is the largest island of Antarctica. It is the second largest island which is uninhabited in the world after Devon Island. It covers an area of 49,070 square km.