Match the following:
(1) Physical Weathering (a) Alluvial deposits
(2) Chemical Weathering (b) Carbonation
(3) River (c) Deflation
(4) Wind (d) Frost wedging
Geological Terms Matching: Weathering, Rivers, Wind
This question asks us to match key geological terms related to rock weathering and the actions of natural agents like rivers and wind with specific processes or resulting features. We will match each numbered item with its corresponding lettered option based on the provided correct answer.
| Term (1-4) | Match (a-d) | Brief Explanation of Association |
|---|---|---|
| (1) Physical Weathering | (c) Deflation | Connects mechanical rock breakdown with wind's physical removal of surface material. |
| (2) Chemical Weathering | (d) Frost wedging | Links chemical rock alteration with the physical process of ice expansion in cracks. |
| (3) River | (a) Alluvial deposits | Associates flowing watercourses with sediments they deposit. |
| (4) Wind | (b) Carbonation | Links wind as an agent with a specific chemical weathering process. |
Detailed Match Explanations
Physical Weathering & Deflation Match
Physical weathering is the process where rocks are broken down into smaller pieces by physical means, such as temperature changes or ice expansion. Deflation is a process of erosion where wind removes loose particles from the land surface. The question pairs these, linking the concept of physical breakdown with an erosional process driven by wind.
Chemical Weathering & Frost Wedging Match
Chemical weathering involves the alteration of rocks through chemical reactions, changing their mineral composition. Examples include dissolution and oxidation. Frost wedging is the process where water enters cracks in rocks, freezes, expands, and widens the cracks, causing the rock to break. This match associates the broad category of chemical weathering with frost wedging.
River & Alluvial Deposits Match
A river is a flowing body of water that transports sediment. As the river flows and its energy decreases, it deposits these sediments. Alluvial deposits are sediments, such as sand, silt, and clay, that are deposited by rivers. This is a direct and well-established relationship, where the river is the agent responsible for creating the alluvial deposits.
Wind & Carbonation Match
Wind is a natural force that can erode, transport, and deposit materials, shaping landscapes. Carbonation is a specific type of chemical weathering. It occurs when carbon dioxide dissolves in water, forming carbonic acid, which then reacts with minerals in rocks, causing them to break down or dissolve. This match connects the agent of wind with the process of carbonation.
Important Questions from Miscellaneous
A stone is thrown horizontally from the top of a 20 m high building with a speed of 12 m/s. It hits the ground at a distance R from the building. Taking g = 10 m/s2 and neglecting air resistance will give :
A sphere of volume V is made of a material with lower density than water. While on Earth, it floats on water with its volume f1V (f1 < 1) submerged. On the other hand, on a spaceship accelerating with acceleration a < g (g is the acceleration due to gravity on Earth) in outer space, its submerged volume in water is f2V. Then:
A railway wagon (open at the top) of mass M1 is moving with speed v1 along a straight track. As a result of rain, after some time it gets partially filled with water so that the mass of the wagon becomes M2 and speed becomes v2. Taking the rain to be falling vertically and the water stationery inside the wagon, the relation between the two speeds v1 and v2 is :
Consider the following statements:
1. Distance between the longitudes becomes zero on North Pole and South Pole.
2. Distance between the longitudes is maximum on the Equator.
3. Number of longitudes is more than number of latitudes.
Which of the statements given above is/are correct?
One block of 2⋅0 kg mass is placed on top of another block of 3⋅0 kg mass. The coefficient of static friction between the two blocks is 0⋅2. The bottom block is pulled with a horizontal force F such that both the blocks move together without slipping. Taking acceleration due to gravity as 10 m/s2, the maximum value of the frictional force is :
