[Mission 2024] STATIC QUIZ, 18 September 2023 – Geography – INSIGHTSIAS

Correct

Solution: b)

 

Statement 2 is incorrect.

 

Sea floor spreading is verified using these phenomena:

• It was realised that all along the mid-oceanic ridges, volcanic eruptions are common and they bring huge amounts of lava to the surface in this area. The sediments on the ocean floor are unexpectedly very thin.
• The age of the rocks increases as one moves away from the crest.
• The ocean crust rocks are much younger than the continental rocks.
• The sediments on the ocean floor are unexpectedly very thin.
• The deep trenches have deep-seated earthquake occurrences while in the mid-oceanic ridge areas, the quake foci have shallow depths.

Correct

Solution: b)

 

Statement 1 is incorrect.

 

The thermosphere is a layer of Earth’s atmosphere. The thermosphere is directly above the mesosphere and below the exosphere. It extends from about 90 km to between 500 and 1,000 km above our planet.

This layer helps in radio transmission. In fact, radio waves transmitted from the earth are reflected back to the earth by this layer.

The space shuttle and the International Space Station both orbit Earth within the thermosphere! This is also where you’ll find low Earth orbit satellites.

It is called the thermosphere because temperatures can reach up to 1,500 degrees Celsius. However, despite the high temperatures, the pressure is very low, so satellites don’t suffer heat damage.

Correct

Solution: d)

 

The following conditions are good for fisheries production & catch:

• Coastal upwelling of nutrient rich colder water
• Abundance of phytoplankton
• Meeting of warm and cold currents
• Shallow continental shelves in cold regions

Correct

Solution: a)

 

Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea. Out in the depths of the ocean, tsunami waves do not dramatically increase in height. But as the waves travel inland, they build up to higher and higher heights as the depth of the ocean decreases.

It depends on Ocean depth rather than the distance from the source of the wave. Tsunami waves may travel as fast as jet planes over deep waters, only slowing down when reaching shallow waters.

Correct

Solution: b)

 

Some initial conditions for the emergence of a tropical cyclone are:

(i) Large and continuous supply of warm and moist air that can release enormous latent heat.

(ii) Strong Coriolis force that can prevent filling of low pressure at the centre (absence of Coriolis force near the equator prohibits the formation of tropical cyclone between 0°-5° latitude).

(iii) Unstable condition through the troposphere that creates local disturbances around which a cyclone develops.

(iv) Finally, absence of strong vertical wind wedge, which disturbs the vertical transport of latent heat.