Class 9 Social Science — Chapter 10: Oceans and Life
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise the most important Class 9 Social Science questions from Chapter 10, "Oceans and Life" — 72 NCERT-aligned multiple-choice questions with answers and explanations. The set is split into 24 Easy, 24 Medium and 24 Hard, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams.
"Oceans and Life" is one of the chapters where dates, cause-and-effect reasoning and map/source interpretation really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+4 correct, −1 wrong, 0 skipped), training the same negative-marking accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Oceans and Life, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 9 Social Science mastery score. A sample question is shown below; sign in free to see its answer and practise all 72.
Key concepts: Oceans and Life (Class 9 Social Science)
Oceans cover most of the planet, store its heat and support an enormous range of life. This chapter covers the properties and movements of ocean water, the resources oceans provide, and how coastal communities prepare for the disasters the sea can bring.
- Extent of the oceans
- Oceans cover about 71% of the earth's surface and hold most of its water, which is why the planet looks blue from space.
- Salinity
- The quantity of dissolved salts in seawater, averaging about 35 parts per thousand and varying with evaporation, rainfall and river inflow.
- Ocean temperature
- Surface water is warmest near the equator and cools towards the poles, and temperature also falls with depth.
- Waves
- Undulations of the sea surface produced by wind; the water itself largely moves up and down while the energy travels forward.
Try a sample question
One free sample from this chapter — sign in to check your answer and practise the rest.
Two coastal areas have the same temperature, but one receives heavy rainfall and large amounts of river water while the other lies in a hot, dry region with little river inflow. The dry region's sea water is likely to have:
Unlock the full chapter — free
See the answer and solution to this question, then practise all 72 questions (24 Easy · 24 Medium · 24 Hard) with timed scoring and instant feedback, plus the complete key-concept notes, formulas & exam tips. Sign in with Google — no card needed.
Start this chapter free →Oceans and Life — FAQs
What are the key concepts in Class 9 Social Science Oceans and Life?+
Oceans cover most of the planet, store its heat and support an enormous range of life. This chapter covers the properties and movements of ocean water, the resources oceans provide, and how coastal communities prepare for the disasters the sea can bring. Key ideas include Extent of the oceans, Salinity, Ocean temperature, Waves.
What does Class 9 Social Science Chapter 10 (Oceans and Life) cover on XamBaaz?+
It covers 72 NCERT-aligned MCQs on "Oceans and Life" — 24 Easy, 24 Medium and 24 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams.
Are these "Oceans and Life" questions free to practise?+
Yes — sign in with Google to practise "Oceans and Life" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Oceans and Life" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
Are these "Oceans and Life" MCQs available with answers?+
Yes. This page shows one sample question so you can see the format; sign in free with Google to reveal the correct option and a step-by-step "Why" explanation for it, then practise all 72 questions with instant scoring.
Is there negative marking in the "Oceans and Life" quizzes?+
Yes — the timed quizzes use exam-grade marking: +4 for a correct answer, −1 for a wrong one and 0 for a skipped question, so you practise the same negative-marking discipline as CBSE Board exams.
Are these important questions for Oceans and Life?+
The set is curated to the NCERT syllabus and weighted toward the question patterns that actually appear in CBSE Board exams, across Easy, Medium and Hard — so it doubles as an "important questions" revision list for "Oceans and Life".