If you are looking for TN Board Class 7 Geography Unit 2 Landforms then you are at the right place. Here we are providing solutions as well as additional QA / Important Notes.
Choose the correct answer
____________ is a deposition of river sediments along the foot-hills.
- Plunge pool
- Alluvial fan
- Flood plain
- Delta
Courtallam falls is located across the____________ river.
- Cauvery
- Pennar
- Chittar
- Vaigai
The landform created by glacial deposition is
- Cirque
- Arete
- Moraine
- Tarn lake
Large deposits of loess are found in
- USA
- India
- China
- Brazil
Land forms which are not associate with wave erosion ____________
- Cliffs
- Sea archs
- Stacks
- Beaches
Fill in the blanks
- The process of breaking and crumbling of rocks is ____________.[weathering]
- The place where the river joins a lake or a sea is known as ____________.[river mouth]
- Inselbergs are found in the ____________desert in South Africa.[Kalahari ]
- A cirque is known as ____________ in Germany.[Kar]
- The longest beach in the world is ____________.[Miami Beach]
Match the following
- Breaking and crumblingof rocks – Glacier
- Abandoned meander loops – Barchans
- Large body of moving ice – Lagoon
- Crescent shaped sand dunes – Weathering
- Vembanad lake – Oxbow lake
Answers:-
- Breaking and crumbling of rocks – Weathering
- Abandoned meander loops – Oxbow lake
- Large body of moving ice – Glacier
- Crescent shaped sand dunes – Barchans
- Vembanad lake – Lagoon
Consider the following statement and tick (P) the appropriate answer
Assertion (A): The deltas are formed near the mouth of the river.
Reason (R) : The velocity of the river becomes slow when it approaches the sea.
- Both A and R are correct
- A is correct and R is wrong
- A is wrong and R is correct
- Both A and R are wrong
Assertion (A): Sea arches in turn become Sea Stacks.
Reason (R) : Sea Stacks are the results of wave deposition.
- Both A and R are correct
- A is correct and R is wrong
- A is wrong and R is correct
- Both A and R are wrong
Answer the following
Define erosion.
Erosion is the process by which natural forces like water, wind, ice, and waves wear away rocks and soil from the earth’s surface, and then transport these materials to new locations.
What is a plunge pool?
A plunge pool is a deep, round pool found at the base of a waterfall. It is formed by the powerful force of falling water which digs into the riverbed below the waterfall.
How are Ox – bow lakes formed?
Ox-bow lakes are formed when a river creates a large bend called a meander. Over time, the bend becomes tighter and eventually gets cut off from the main river, leaving a curved, isolated lake.
Name the major landforms formed by glacial erosion.
Major landforms formed by glacial erosion include cirques (bowl-shaped basins), arêtes (sharp ridges), U-shaped valleys, and horns (sharp mountain peaks).
Give a note on Mushroom rocks.
Mushroom rocks are unique rock formations found in deserts. They have a narrow base and a wider top, resembling a mushroom. They form because wind erosion wears away the lower part of the rock more than the upper part.
What is a lagoon? Give an example.
A lagoon is a shallow body of water separated from the sea by a barrier such as a sandbar or coral reef. An example of a lagoon is Chilika Lake in Odisha, India.
Distinguish the following
Tributary and Distributary
Tributary:
A tributary is a smaller stream or river that flows into a larger river.
Example: The Yamuna River is a tributary of the Ganges River.
Distributary:
A distributary is a branch of a river that flows away from the main river channel, usually found in deltas.
Example: The Hoogly River is a distributary of the Ganges River.
‘V’ shaped valley and ‘U’ shaped valley
‘V’ Shaped Valley:
A V-shaped valley is a valley with steep sides that looks like the letter “V.” It is formed by river erosion.
Example: Valleys in the Himalayas.
‘U’ Shaped Valley:
A U-shaped valley is a valley with a flat bottom and steep sides, looking like the letter “U.” It is formed by glacial erosion.
Example: Yosemite Valley in the USA.
Continental glacier and Mountain glacier
Continental Glacier:
A continental glacier is a massive ice sheet that covers large areas of a continent.
Example: The ice sheets in Antarctica and Greenland.
Mountain Glacier:
A mountain glacier is a smaller glacier found in high mountain areas, flowing down valleys.
Example: Glaciers in the Himalayas and the Alps.
VIII Answer in a paragraph
Explain different landforms produced by river erosion.
River erosion creates various landforms as it flows over the land. It forms V-shaped valleys in mountains by cutting through rock over time. When waterfalls happen, they create plunge pools at their base where the water hits the ground. Rivers also create meanders, which are large bends in the river that form curves over time. Sometimes, meanders can get cut off from the river, forming ox-bow lakes. When rivers flood, they leave behind layers of soil called floodplains, which are flat and fertile. Near where rivers meet the sea, they slow down and deposit sediments, creating deltas that look like fans.
Describe the landforms associated with wind.
Wind creates special shapes in dry places like deserts. It shapes mushroom rocks, which are rocks that have a small base and a wide top, making them look like mushrooms. It also forms sand dunes, which are hills of sand formed by wind blowing the sand into piles. Some sand dunes are shaped like crescents and are called barchans. Wind also carries very fine sand and dust called loess, which it deposits in big areas, making rich soil.
How are aretes formed?
Aretes are narrow ridges that form between two valleys that had glaciers. Glaciers are big sheets of ice that move slowly, and they carve away rock as they move. When glaciers move, they grind against the sides of the mountains, making them thinner and sharper. Over time, this grinding creates narrow ridges called aretes between the valleys. These ridges are very steep and sharp because of the ice wearing away the rock.
