Drainage Class 9 Assertion Reason CBSE Geography Chapter 3

A1: Assertion-Reason questions are a type of question format used in CBSE exams where two statements are provided: an Assertion (A) and a Reason (R). Students need to determine whether each statement is true or false and if the Reason correctly explains the Assertion.

A2: Unlike multiple-choice questions, Assertion-Reason questions require students to analyze the relationship between two statements. It’s not just about knowing the facts but understanding how they connect logically.

A3: Follow these steps:
Read both statements carefully. Understand what each statement is saying.
Determine the truth value of each statement. Decide if each statement is true or false independently.
Analyze the relationship. If both statements are true, decide whether the Reason (R) correctly explains the Assertion (A).
Choose the correct option. Based on your analysis, select the appropriate answer from the given options.

A4: The typical options are:
A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true.

A5: Ensure that the Reason provides a logical explanation for the Assertion. Check if the Reason directly addresses the cause or basis of the Assertion and if they are contextually linked.

A6: Practice regularly with sample questions and past papers. Focus on understanding the concepts thoroughly rather than rote memorization. Analyzing how different facts and concepts interrelate will enhance your ability to correctly answer these questions.

A7: Common mistakes include:
Not reading the statements carefully and missing key details.
Assuming the Reason explains the Assertion without checking the logical connection.
Confusing the order or relationship between the statements.
Overthinking and adding information not provided in the question.

A8: Contextual understanding is crucial. It helps you determine whether the Reason accurately and logically explains the Assertion within the context of the subject matter.

A9: Use study guides specifically designed for Assertion-Reason questions. Online educational platforms and reference books for Class 9 Social Science also offer practice questions and explanations. xamcontent.com also provides assertion reason questions for cbse class 9 social science.

A10: Important keywords for CBSE Class 9 Drainage are given below:
Basin: The catchment of a river system.
Catchment Area: Area drained by a major river system and its tributaries.
Drainage: The process by which water is discharged from an area by a river.
Drainage System: That part of the land surface which is drained by a unitary river system.
Delta: A triangular and level tract of alluvium formed at the mouth of a river entering a relatively quiet body of water.
Flood Plain: The relatively flat land stretching from either side of river to the bottom of the valley walls.
Estuary: The area of a river mouth which is affected by sea tides.
Inland Drainage: A drainage pattern which is confined to an inland basin, with no outlet to the sea.
Water Divide: The upland or mountain which separates two adjoining drainage basin.
Waterfall: A point in the long profile of a river where the water descends vertically.

A11: Interesting facts related to drainage-
(i) The Indus Water Treaty was signed between India and Pakistan in 1960.
(ii) Kosi river is known as the Sorrow of Bengal.
(iii) Jog falls (271 metres) is the famous waterfall.
(iv) Indus, Satluj and Brahmaputra are Trans-Himalayan rivers.
(v) Indus is one of the longest rivers in the world.
(vi) Phase-I on NRCR (National River Conservation Plan) was started in 1985.

A12: A river along with its tributaries is called a river system.

A13: The Sunderban delta has derived its name from Sundari tree found in this region.

A14: A braided stream is characterised by a network of interconnected converging and diverging channels resembling the strands of a braid. The entire river system is generally shallow, so that the intervening single bars and alluvial material are exposed at low water.

A15: The Sivasamudram is the second biggest waterfall in India. It is located on the river Kaveri.

A16: An oxbow lake is formed when a meander takes almost a complete circle and the meandering river cuts across the narrow neck of the land. When silt is deposited at the entrance to the backwater, an oxbow lake is produced.

A17: The Indus, the Satluj and the Brahmaputra flow almost parallel on the mountain chain and then suddenly turn south to pierce the Himalayas. That is why these rivers do not form a perfect water divide.