Class 9 Social Science — Chapter 10: Oceans and Life
72 practice questions · 24 Easy · 24 Medium · 24 Hard
Practise Class 9 Social Science Chapter 10, "Oceans and Life", with 72 NCERT-aligned multiple-choice questions. The set is split into 24 Easy, 24 Medium and 24 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and the JEE & NEET foundation years.
"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 (+2 correct, −1 wrong, 0 skipped), training the same 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 few sample questions are shown below; sign in free to practise all 72.
Sample questions
What is salinity of ocean water usually measured as?
Salinity is the amount of dissolved salts, expressed as grams of salt per 1,000 grams (parts per thousand) of sea water.
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:
High evaporation with little fresh water from rain or rivers concentrates the salts, so the dry region's sea water has higher salinity.
Two open-ocean stations at the same latitude record different surface salinities: Station X is 32 ppt and Station Y is 37 ppt. Which single difference best explains the higher salinity at Station Y?
Strong evaporation removes water while leaving salts behind, and little fresh-water inflow means the salts are not diluted, so Station Y is saltier.
Oceans and Life — FAQs
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 and the JEE & NEET foundation years.
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.
Practise all 72 questions free
Timed quizzes, instant scoring, streaks and XP. Sign in with Google — no card needed.
Start this chapter free →