Class 9 SST Part 2 Chapter 1 Solutions – Oceans and Life
Looking for accurate and complete ncert class 9 social science part 2 chapter 1 solutions for the new CBSE curriculum (2026-27)? You are in the right place! In this guide, we provide step-by-step, direct, and easy-to-understand solutions for all exercise questions from Understanding Society: India and Beyond Class 9 SST Part 2 Chapter 1: Oceans and Life. These answers are crafted specifically to help students write clean, exam-ready answers in their notebooks without extra confusion or lengthy fluff.
Question 1
How do different features of the ocean floor affect human activities such as fishing, transport, and underwater exploration?
- Continental Shelf: Shallow and rich in nutrients, making it ideal for fishing. It also holds resources like oil and gas, aiding in transport and energy extraction.
- Continental Slope: Steep drop-off that limits fishing and transport, but is important for underwater exploration.
- Abyssal Plain: Flat and deep ocean floor, used for laying underwater cables (transport/communication).
- Mid-Ocean Ridge & Seamounts: Volcanic features that support rich marine life, making them good fishing spots.
- Ocean Trenches: Deepest parts, mostly unexplored, but crucial for scientific research.
Question 2
How do waves, tides, and ocean currents influence climate, marine life, and human activities around the world?
- Waves: Shape coastlines through erosion and deposition (creating beaches and cliffs). They also influence marine life by mixing nutrients.
- Tides: Help in navigation (ships enter ports during high tide), support fishing (fish come closer to shore), and can be used to generate tidal energy.
- Ocean Currents: Regulate global climate (warm currents like the Gulf Stream warm coastal regions; cold currents cool them). They also distribute nutrients, supporting marine life and influencing fishing grounds.
Question 3
Describe the importance of marine resources.
Marine resources are vital for:
- Food Security: Fish and seafood are major sources of protein for millions.
- Livelihood: Fishing, aquaculture, and coastal tourism support the economies of coastal communities.
- Energy: Offshore oil, natural gas, and renewable blue energy (tidal/wave energy) are crucial.
- Minerals: Sand, gravel, and deep-sea minerals are used in construction and technology.
- Trade: 90% of global trade is carried by sea.
- Culture: The sea has deep cultural and religious significance in India (e.g., the sacred shankha).
Question 4
Draw a poster that encourages people to protect marine resources. Include a slogan (like Save Our Seas or Fish for the Future) and explain your message in 2-3 sentences.
(This is a creative activity). Here is a sample:
Slogan: "Save Our Seas for a Better Tomorrow!"
Explanation: Our oceans are facing threats like plastic pollution and overfishing. By reducing plastic use, recycling, and supporting sustainable fishing, we can protect marine life and ensure that future generations can enjoy the ocean's resources.
Question 5
Using a map of India, mark at least five coastal states that might need tsunami warnings.
(This is a map activity). You can mark the following coastal states on the map of India:
- Gujarat
- Maharashtra
- Kerala
- Tamil Nadu
- Andhra Pradesh
- Odisha
- West Bengal
Question 6
Work in a group and act out what would happen when a cyclone warning is issued. Highlight what role different people, like scientists, officials, and coastal villagers, would play.
(This is a role-play activity). Here are the roles:
- Scientists (IMD/INCOIS): Monitor the cyclone, predict its path and intensity, and issue early warnings.
- Officials (District Administration): Receive the warning, activate emergency protocols, open cyclone shelters, and coordinate rescue teams.
- Coastal Villagers: Listen to warnings, evacuate to safe shelters, secure their belongings, and help vulnerable neighbours.
- Media: Broadcast warnings and safety instructions to the public.
Question 7
Suppose a foreign ship is sailing through India's territorial sea. What principle allows the ship to pass through these waters, subject to certain conditions?
The principle of Innocent Passage allows foreign ships to pass through a country's territorial sea, provided the passage is continuous, expeditious, and not prejudicial to the peace, good order, or security of the coastal state.
Question 8
A country has an Exclusive Economic Zone (EEZ) extending up to 200 nautical miles from its baseline. What rights does the country have over the natural resources in this zone?
In the EEZ, the coastal country has sovereign rights for the purpose of exploring, exploiting, conserving, and managing natural resources (both living and non-living) in the waters, on the seabed, and in the subsoil. This includes fishing rights and rights to extract oil and gas.
Question 9
Create a model of an ocean with ship routes, protected zones, and safety measures. Based on the model, explain how it follows maritime laws and protects the ocean.
(This is a project activity). Your model should include:
- Ship Routes: Clearly marked lanes for navigation (following COLREGs).
- Protected Zones: Marine Protected Areas (MPAs) where fishing and shipping are restricted to conserve biodiversity.
- Safety Measures: Buoys, lighthouses, and early warning systems.
- Explanation: The model shows how international laws (like UNCLOS and MARPOL) guide ships safely, prevent collisions, and protect marine ecosystems from pollution.
Frequently Asked Questions (FAQs)
Based on latest NCERT class 9 book.