Chapter: 04. Major Water Bodies
I. Multiple Choice Questions (5 Marks)
Choose the best answer for each question.
Which ocean is the largest and covers over one-third of the globe?
a) Atlantic Ocean
b) Indian Ocean
c) Pacific Ocean
d) Arctic Ocean The Mid-Atlantic Ridge, a submerged mountain range, is found in which ocean?
a) Pacific Ocean
b) Atlantic Ocean
c) Indian Ocean
d) Southern Ocean Which of these is the deepest part of the Earth’s crust?
a) Mid-Atlantic Ridge
b) Bay of Bengal
c) Mariana Trench
d) Palk Strait Chilika Lake is famous for being a large ground for which type of birds in winter?
a) Predatory birds
b) Migratory birds
c) Domestic birds
d) Aquatic birds What percentage of all marine pollution is made up of plastic waste?
a) 50 per cent
b) 60 per cent
c) 70 per cent
d) 80 per cent II. Fill in the Blanks (5 Marks)
Complete the sentences with the correct word(s).
Water covers _ _ _ _ _ _ _ _ _ _ _ _ _ _ per cent of the Earth’s surface. The _ _ _ _ _ _ _ _ _ _ _ _ _ _ Ocean is named after a country. A _ _ _ _ _ _ _ _ _ _ _ _ _ _ is a narrow stretch of water that joins two large water bodies. The world’s longest river is the _ _ _ _ _ _ _ _ _ _ _ _ _ _ River in Africa. Untreated liquid waste from households can cause diseases like _ _ _ _ _ _ _ _ _ _ _ _ _ _. III. True or False (5 Marks)
Write ‘True’ or ‘False’ for each statement.
The Atlantic Ocean is the busiest ocean in the world. The Arctic Ocean is the smallest and shallowest ocean. Lake Victoria is the main reservoir of the Amazon River. The ‘Ring of Fire’ is a term for active volcanoes around the Pacific Ocean. Oil spills are only harmful to fish, not birds or other animals. IV. Short Answer Questions (9 Marks)
Answer the following questions in 2-3 sentences.
What is a sea, and where are seas usually located? List three ways oceans are important to us. What are the three main causes of water pollution? What is ‘surface run-off’ in the context of water pollution? What important discovery did Marie Tharp make about the Atlantic Ocean? How does plastic pollution specifically harm marine animals? V. Diagram-Based Questions (4 Marks)
Question 1:
Description: A three-part diagram showing a river’s journey. Part 1: A steep mountain with a narrow, fast-flowing river. Part 2: The river winding through gentler, rolling hills with a wider channel. Part 3: The river spreading out into multiple channels (distributaries) forming a triangular landmass at the coast, flowing into a larger body of water.
Identify the stage of the river shown in Part 1. How does the river flow here? What landform is typically created by the river at the end of Part 3? VI. Long Answer Questions (6 Marks)
Answer the following questions in 4-5 sentences.
Explain the three different stages of a river’s course from its source to its mouth, mentioning how the land and flow change in each stage. Describe the challenges related to plastic pollution in oceans, mentioning its scale and impact on marine life according to the Sustainable Development Goals. 
Question Paper
