Category 1
The Brahmaputra River originates from the _____________________ in Tibet.
Himalayas (north side)
_____________ are the granaries of the world.
Plains
Asia joined with Europe. The combined landmass is called _______________
Eurasia
________________ is the rebuilding of a lowered surface.
Deposition
Millions of years ago one big land mass was a part of the Earth. It is _________________
Pangaea
Which process is used for the formation of Block mountain? Give one example of block mountain.
Endogenous Process.
Example: The Vosges and Black forest in Europe, The Vindhyas in India.
Difference between old fold mountain and young fold mountain. (2 points + 1 example each)
Old - formed over 250 million years ago. Example - Urals (Russia). Gentle slope and low altitude.
Young - formed recently about 25 million years ago. Example - Himalayas, Rockies, Alps, Andes. Ruggged and lofty.
Give Reason - Mountains are used for generation of hydro electricity. (2 points)
- Storehouse of water - many rivers originate here.
- reserviors are made. on these water sources, electricity is generated.
What is a plateau? Give 2 examples.
- Plateaus are the uplifted section/ of the earth's curst/ that are almost / flat or level/ and usually descend steeply to the surrounding lowlands.
- Examples - Chota Nagpur Plateau, Malwa plateau, Deccan plateau.
What is a plain? Why are they also called river plains?
- Plains are lowlands/ which are vast,flat and expanses of land/ which are usually less/ than 200 mtrs above sea level.
- It is built by alluvium deposited by big rivers.
Explain the process of Subduction.
- Mountains are formed when 2 large plates (tectonic plates) collide under the earth's surface.
- Collision leads to the plates being pushed upwards to form peaks.
- collision leads the heavier plates below the lighter plates. - this is called subduction.
- Volcanic mountains are built when/ molten lava, ash, cinder and dust / from deep inside / the earth come out on the surface/ through cracks/ in the earth's crust and/ accumulate in the shape of high cones.
- Mt. Fuji, Mt. Kilimanjaro, Mt. Etna,
Give Reason - Antarctica contains 90 percent of the world's ice.
- Antarctica is a large frozen landmass.
- most bleak and barren part of the world.
- its colder than the Arctic region, surrounded by the stormiest seas.
What are tectonic plateaus - Give example
Tectonic plateau is formed by the movement of the earth's plates, causing a huge portion to rise.
Example - Turkish - Iranian Plateau
What are depositional plains?
- formed by sediments brought down on a large scale by natural agents
What is an intermontane plateau? Give example.
- surrounded by mountains.
Example: Tibetan Plateau
Explain 2 ways in which landforms and people are interdependent?
- earthquake and volcanic eruptions cause loss to human life. - it affects the weather.
- it influences the climate.
importance of plains.
- cities and towns are formed. - industralization - construction of roads - most suitable for humans and animals.
Give reason - Australia is known as an island continent.
- smallest continent.
- water on all sides.
importance of mountains
- storehouse of water.
- used for irrigation and generation of hydro electricity.
- affect the climate of an area. - rich in minerals