Water (Oceans) Ch (12) Practice Quiz in English Part 1 || Class 11 Geography Book -1 Practice Quizzes in English Posted on February 27, 2025February 27, 2025 by Anshul Gupta0% 0 votes, 0 avg 0 Water (Oceans) Ch (12)Practice Quiz in English Part 1 || Class 11 Geography Book -1 Practice Quizzes in English 1 / 201. Which ocean has the highest average salinity? A. Atlantic Ocean B. Pacific Ocean C. Indian Ocean D. Arctic Ocean Explanation: The Atlantic Ocean has the highest average salinity among the major oceans, primarily due to factors such as higher evaporation rates and lower freshwater inflow compared to other oceans.2 / 202. What is the name for a mountain with a pointed summit rising from the seafloor but not reaching the ocean surface? A. Guyot B. Canyon C. Atoll D. Seamount Explanation: Seamounts are underwater mountains, typically formed by volcanic activity, that rise from the seafloor but do not reach the ocean’s surface.3 / 203. What is the largest ocean on Earth? A. Indian Ocean B. Pacific Ocean C. Arctic Ocean D. Atlantic Ocean Explanation: The Pacific Ocean is the largest and deepest ocean on Earth, covering a significant portion of the planet’s surface.4 / 204. Which of the following is NOT a characteristic feature of oceanic deeps? A. Association with active volcanoes and earthquakes B. Flat plains C. Narrow basins D. Steep sides Explanation: Oceanic deeps are characterized by steep sides, narrow basins, and their association with active volcanoes and earthquakes. They are not flat plains; those are characteristic of deep sea plains.5 / 205. What is the average salinity of ocean water? A. 40 parts per thousand B. 45 parts per thousand C. 30 parts per thousand D. 35 parts per thousand Explanation: The average salinity of ocean water is approximately 35 parts per thousand, meaning that 35 grams of salt are dissolved in every 1,000 grams of seawater.6 / 206. What is the approximate average width of continental shelves? A. 100 km B. 120 km C. 80 km D. 150 km Explanation: Continental shelves vary in width, but their average width is about 80 kilometers.7 / 207. Which of the following is a landlocked sea with very high salinity? A. Baltic Sea B. North Sea C. Red Sea D. Black Sea Explanation: The Red Sea is a landlocked sea known for its high salinity due to high evaporation rates and limited freshwater inflow.8 / 208. What is the name for a flat-topped seamount? A. Atoll B. Canyon C. Seamount D. Guyot Explanation: Guyots are flat-topped seamounts that were once volcanic islands but have subsided over time due to erosion and other geological processes.9 / 209. What is the deepest part of the ocean floor called? A. Oceanic deeps B. Continental slope C. Deep sea plain D. Continental shelf Explanation: Oceanic deeps, also known as trenches, are the deepest parts of the ocean floor, often characterized by steep, narrow depressions.10 / 2010. What is the term for the continuous exchange of water between the oceans, atmosphere, and land? A. Both (a) and(b) B. Water cycle C. Hydrological cycle D. None of the above Explanation: The hydrological cycle and the water cycle are interchangeable terms that describe the continuous movement of water in its various forms (liquid, solid, and gas) through the Earth’s systems.11 / 2011. What is the name for the layer in the ocean where salinity increases sharply with depth? A. Pycnocline B. Halocline C. Thermocline D. Isocline Explanation: The halocline is the zone in the ocean where salinity changes abruptly with depth.12 / 2012. What is the term for the process by which water changes from a liquid to a gas? A. Evaporation B. Sublimation C. Condensation D. Precipitation Explanation: Evaporation is the process by which water changes from a liquid state to a gaseous state, primarily due to the input of heat energy.13 / 2013. What is the name for a low island in the tropical oceans consisting of coral reefs surrounding a central depression? A. Seamount B. Atoll C. Guyot D. Canyon Explanation: Atolls are ring-shaped coral reefs or a series of islets that surround a central lagoon.14 / 2014. Which of the following processes is NOT part of the hydrological cycle? A. Evaporation B. Condensation C. Sublimation D. Precipitation Explanation: While sublimation (the transition of a substance directly from the solid to the gas phase) can occur with water, it is not a major component of the hydrological cycle. The primary processes involved are condensation, precipitation, and evaporation.15 / 2015. What is the name for the boundary region in the ocean where temperature decreases rapidly with depth? A. Halocline B. Pycnocline C. Thermocline D. Isocline Explanation: The thermocline is the transitional layer in the ocean where temperature changes rapidly with depth, separating the warmer surface waters from the colder deep waters.16 / 2016. What percentage of the Earth’s surface is covered in water? A. 71% B. 81% C. 61% D. 51% Explanation: Approximately 71% of the Earth’s surface is covered by water, primarily in the form of oceans.17 / 2017. Which of the following factors does NOT significantly affect the salinity of ocean water? A. Water temperature B. Precipitation C. Evaporation D. Ocean currents Explanation: While water temperature can indirectly influence salinity, the primary factors affecting ocean salinity are evaporation, precipitation, and ocean currents.18 / 2018. Which of the following is NOT a major ocean on Earth? A. Pacific Ocean B. Indian Ocean C. Southern Ocean D. Atlantic Ocean Explanation: The four major oceans on Earth are the Pacific, Atlantic, Indian, and Arctic Oceans. The Southern Ocean is considered a body of water surrounding Antarctica.19 / 2019. What is the shallowest part of the ocean floor called? A. Continental shelf B. Continental slope C. Deep sea plain D. Oceanic deeps Explanation: The continental shelf is the gently sloping, submerged extension of a continent that extends from the shoreline to the continental slope.20 / 2020. What is the primary source of energy for heating ocean water? A. Wind energy B. Tidal energy C. Geothermal energy D. Solar energy Explanation: The sun’s energy, or solar radiation, is the primary source of heat for the Earth’s oceans.Please insert your information to see your ranking अपनी Ranking जानने के लिए कृपया अपनी जानकारी भरे NamePhone Number Your score isThe average score is 0% 0% Restart quiz Category: Class 11 Geography Quizzes in English
