Mastery

Oceans and Continents — Mastery

30 questions 30 min Full-chapter mastery

Q1. Which pair correctly matches surface share with feature, as in the chapter?
- A. Water ~ one-fourth; Land ~ three-fourths
- B. Water ~ one-half; Land ~ one-half
- C. Water ~ three-fourths; Land ~ a little over one-fourth
- D. Water ~ one-tenth; Land ~ nine-tenths
Q2. The fifth ocean named in the chapter, surrounding Antarctica, is also called the
- A. Antarctic (Southern) Ocean
- B. Arctic Ocean
- C. Pacific Ocean
- D. Atlantic Ocean
Q3. In the 'four continents' count given in the chapter table, which grouping appears?
- A. Africa, Asia, Europe, America
- B. Africa-Eurasia, America, Antarctica, Australia
- C. North America, South America, Asia, Africa
- D. Eurasia, Africa, Antarctica, Asia
Q4. The 'six continents' count, reflected in Fig. 2.3 on the world map, treats which as separate?
- A. Europe and Asia as two, Americas as one
- B. Europe and Asia as one (Eurasia), Americas as two
- C. All seven separately
- D. Africa and Eurasia as one
Q5. On the world map (Fig. 2.3), why does the Pacific Ocean appear on BOTH the left and right edges?
- A. There are two different Pacific Oceans
- B. It is mislabelled on the map
- C. The flat map splits the single, very large Pacific at its edges
- D. Half of it is actually the Atlantic
Q6. Which statement about ocean life is supported by the chapter?
- A. Life is found only at the sun-lit surface
- B. Each part of the ocean, from surface to dark depths, has its own diverse life forms
- C. No life survives below the surface
- D. Only algae live in the deep ocean
Q7. According to the chapter, coastal peoples' cultures often include tales and legends about
- A. Desert storms and dunes
- B. Mountain spirits only
- C. The sea, sea gods and goddesses, sea monsters and treasures
- D. Forest animals only
Q8. The Indian Navy's motto 'Sam noh Varunah' is an invocation to Varuna, a Vedic deity associated with
- A. Fire and the sun
- B. Mountains and forests
- C. The oceans, the sky and water
- D. War and weapons
Q9. A class discussion follows Fig. 2.2. Which conclusion about water and land is best supported?
- A. The Southern Hemisphere has the higher proportion of water
- B. The Northern Hemisphere has the higher proportion of water
- C. Both hemispheres have identical water-to-land ratios
- D. Neither hemisphere has any land
Q10. Antarctica, explored by India since 1981, is described in the chapter as a continent that is
- A. Warm and densely populated
- B. Very cold and harsh, mostly covered with ice
- C. A large island, not a continent
- D. The smallest landmass on Earth
Q11. The United Nations designated which date as World Oceans Day to remind us of the ocean's role?
- A. 22 April
- B. 8 June
- C. 5 June
- D. 2 October
Q12. Which list correctly gives the seven continents as in the chapter table?
- A. Africa, Antarctica, Asia, Australia, Europe, North America, South America
- B. Africa, Asia, Eurasia, Australia, Europe, America, Antarctica
- C. Africa-Eurasia, America, Antarctica, Australia, Asia, Europe, India
- D. Pacific, Atlantic, Indian, Arctic, Southern, Asia, Africa
Q13. If the oceans suddenly vanished, the chapter implies the most direct consequence would be
- A. There would be no rainfall and Earth would become a desert
- B. More islands would appear
- C. The continents would shrink
- D. The Arctic would expand
Q14. In the chapter, 'overfishing' is described as
- A. Fishing only during the monsoon
- B. Excessive fishing that causes the decline of marine life
- C. Fishing with traditional nets
- D. Catching only large fish
Q15. The chapter opens with a quotation by Jules Verne (1870) stating the ocean covers what fraction of the terrestrial globe?
- A. One-half
- B. One-fourth
- C. Seven-tenths
- D. Nine-tenths
Q16. A student claims 'Australia is the largest island'. How should this be evaluated using the chapter?
- A. Incorrect; Australia is a continent, and Greenland is the largest island
- B. Correct, Australia is the largest island
- C. Correct, because Australia is surrounded by water
- D. Incorrect; the largest island is Antarctica
Q17. Which statement about the Arctic and Southern Oceans is correct?
- A. Both surround Antarctica
- B. The Southern is near the North Pole; the Arctic surrounds Antarctica
- C. The Arctic is near the North Pole; the Southern surrounds Antarctica
- D. Both are near the Equator
Q18. In the 2004 Indian Ocean tsunami, the chapter records that the number of people who lost their lives was
- A. More than two lakh
- B. About two thousand
- C. About twenty thousand
- D. Fewer than one hundred
Q19. Freshwater on the planet is found in glaciers, rivers, lakes, the atmosphere and underground. The underground form is called
- A. Seawater
- B. Marine water
- C. Rainwater
- D. Groundwater
Q20. In which continent count are Africa and Eurasia merged into a single 'Africa-Eurasia'?
- A. Seven continents
- B. Four continents
- C. Five continents
- D. Six continents
Q21. Which is the second largest ocean after the Pacific, according to the chapter?
- A. Atlantic Ocean
- B. Indian Ocean
- C. Southern Ocean
- D. Arctic Ocean
Q22. Storms such as cyclones, which originate over the ocean, mainly cause widespread damage to
- A. Inland deserts
- B. The deep ocean floor
- C. Coastal regions of the world
- D. Mountain peaks
Q23. Observing Figs. 2.2 and 2.3, the chapter concludes that continents
- A. Include every bit of land on Earth
- B. Float freely on the oceans
- C. Are entirely covered by ice
- D. Do not include all landmass; some smaller pieces are left out as islands
Q24. Despite abundant water on Earth, the chapter's 'Think About It' raises a water crisis. Which reasoning best explains the paradox?
- A. All ocean water is frozen
- B. Most water is salty seawater; usable freshwater is only a very small proportion
- C. Water is evenly shared by all countries
- D. Rivers carry no water
Q25. In the relative-size diagram activity, students list continents from smallest to largest. Which is the smallest continent shown?
- A. Antarctica
- B. Australia
- C. Europe
- D. South America
Q26. The chapter describes the oceans as both the source of dangers and blessings to humanity. Which best illustrates a 'blessing'?
- A. Providing food through fishing and routes for trade
- B. Tsunamis submerging coasts
- C. Cyclones destroying coastal regions
- D. Plastic pollution choking marine life
Q27. The lines dividing the five oceans on the map are best described as
- A. Solid physical walls of rock
- B. Lines of latitude only
- C. Borders patrolled by ships
- D. Conventions, since the natural world does not follow such boundaries
Q28. The chapter concludes that protecting oceans for the future is
- A. The duty of fishermen alone
- B. Unnecessary, as oceans are vast
- C. Only the government's task
- D. Our collective responsibility
Q29. Approximately how many small islands does the chapter say India has?
- A. More than 13,000
- B. About 130
- C. About 13
- D. More than 1,300
Q30. Why do oceans and continents both play a vital role on Earth, according to the chapter?
- A. They produce earthquakes
- B. They create new planets
- C. They shape the climate and affect all aspects of life
- D. They store all of Earth's minerals

Your score and per-question explanations appear here instantly.