Class 11 Geography Important Chapter 13 Ocean Waves and Currents

Class 11 Geography Important Chapter 13 Ocean Waves and Currents Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Geography Important Solutions and select need one. AHSEC Class 11 Elective Geography Additional Notes English Medium Download PDF. HS 1st Year Finance Important Solutions in English.

Class 11 Geography Important Chapter 13 Ocean Waves and Currents

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 11 Elective Geography Additional Question Answer are part of All Subject Solutions. Here we have given HS 1st Year Elective Geography Important Notes in English for All Chapters, You can practice these here.

Ocean Waves and Currents

Chapter: 13

THIRD UNIT : GEOMORPHIC FEATURES AND THEIR EVOLUTIONARY PROCESS

IMPORTANT QUESTION AND ANSWER

Answer The Following Questions:

1. Where are Cliffs formed?

Ans: Cliffs are generally formed along rocky highland coasts where the erosional activity of waves is most intense.

2. What is a Offshore Bar?

Ans: Sandy ridges formed parallel to the shoreline in the offshore zone are called Offshore Bars.

3. What is a Delta?

Ans: A Delta is a low-lying depositional plain formed at the mouth of a river where it meets the sea.

4. How is a depositional coast formed?

Ans: A depositional coast is formed by the accumulation of sediments brought by rivers and waves.

5. What is a Submerged Bar?

Ans: A sand bar lying under seawater near the coast is called a Submerged Bar.

6. What is the role of waves in erosion?

Ans: The impact of strong waves causes erosion of rocks and soil along the coast, shaping new landforms.

7. What happens when sand accumulates along the coast?

Ans: When sand accumulates along the coast, it forms beaches or sand dunes.

8. Where are submerged bars located?

Ans: Submerged bars are found parallel to the coastline, beneath the surface of the sea.

9. Due to erosional activity, which two main landforms are extensively formed?

Ans: Due to erosion, wave-cut cliffs and wave-cut terraces are the two major erosional landforms formed.

10. What is the long narrow feature rising above the sea surface called?

Ans: A long narrow feature rising above the sea surface is called a Barrier Bar.

Long Question & Answer:

1. What are erosional landforms?

Ans: Erosional landforms are formed due to the continuous action of waves cutting and eroding coastal rocks. The two major erosional landforms are wave-cut cliffs and wave-cut terraces. Cliffs are steep rock faces rising from the sea, generally 2 to 30 metres high. At the base of the cliffs, gently sloping platforms called wave-cut terraces are formed. Continuous horizontal erosion at sea level creates notches, which may develop into marine caves. When the roof of such a cave collapses, it leaves isolated rocks standing offshore, known as Sea Stacks.

2. What are Ocean Waves? Explain their causes.

Ans: Ocean waves are rhythmic movements on the surface of seas and oceans, caused mainly by wind or other external forces.

(i) When the wind blows across the sea surface for a long time, friction between air and water creates pressure, forming waves.

(ii) Underwater earthquakes, volcanic eruptions, or landslides can also generate strong waves or tsunamis.

(iii) Waves transfer energy from one place to another, though water particles mainly move in circular motion.

(iv) Waves play a major role in shaping coastlines, influencing climate, and maintaining ocean balance.