CLASS 7 CHAPTER 5 WATER MCQs

mcqs = [ (“What is the process by which water continually changes its form and circulates between oceans, atmosphere, and land?”, {“A”: “Tides”, “B”: “Evaporation”, “C”: “Ocean currents”, “D”: “Water cycle”}, “D”), (“Which of the following is a major source of fresh water?”, {“A”: “Oceans”, “B”: “Seas”, “C”: “Glaciers”, “D”: “Salt lakes”}, “C”), (“What is the term used for an artificial enclosure for keeping small house plants?”, {“A”: “Aquarium”, “B”: “Terrarium”, “C”: “Glasshouse”, “D”: “Greenhouse”}, “B”), (“What percentage of the earth’s surface is covered by water?”, {“A”: “50%”, “B”: “97%”, “C”: “Three-fourth”, “D”: “80%”}, “C”), (“Why do some countries face water scarcity despite the earth being covered by more water than land?”, {“A”: “All water is fresh”, “B”: “Most of the water is salty and not fit for consumption”, “C”: “Water is found only in rivers”, “D”: “Water evaporates quickly”}, “B”), (“Which of the following is the largest source of Earth’s fresh water?”, {“A”: “Rivers”, “B”: “Glaciers”, “C”: “Groundwater”, “D”: “Lakes”}, “B”), (“What percentage of the Earth’s water is available for human use?”, {“A”: “1%”, “B”: “3%”, “C”: “10%”, “D”: “5%”}, “A”), (“What is groundwater stored in layers of rock known as?”, {“A”: “Aquifers”, “B”: “Tides”, “C”: “Oceans”, “D”: “Bays”}, “A”), (“Which of the following is a reason for water scarcity in many parts of the world?”, {“A”: “Overconsumption and pollution”, “B”: “Excess rainfall”, “C”: “Too many rivers”, “D”: “Desalination plants”}, “A”), (“What is the major cause of the depletion of groundwater in urban areas?”, {“A”: “Deforestation”, “B”: “Overuse and unregulated extraction”, “C”: “Increased rainfall”, “D”: “Ocean water mixing”}, “B”), (“What is the percentage of saltwater on Earth?”, {“A”: “50%”, “B”: “71%”, “C”: “97%”, “D”: “25%”}, “C”), (“What is the main cause of water pollution as mentioned in the text?”, {“A”: “Evaporation”, “B”: “Dumping of waste materials into water bodies”, “C”: “Natural disasters”, “D”: “Excess rainfall”}, “B”), (“Which of the following human activities contributes most to the contamination of groundwater?”, {“A”: “Fishing”, “B”: “Agricultural runoff”, “C”: “Swimming”, “D”: “Desalination”}, “B”), (“What are the effects of water pollution on marine life?”, {“A”: “Increased marine population”, “B”: “Decreased oxygen levels, harming aquatic organisms”, “C”: “No effect on marine life”, “D”: “Improved water quality”}, “B”), (“How can individuals contribute to reducing water pollution?”, {“A”: “By using more plastic”, “B”: “By disposing of waste responsibly”, “C”: “By using more chemicals in farming”, “D”: “By avoiding recycling”}, “B”), (“What percentage of the Earth’s surface is covered by oceans?”, {“A”: “50%”, “B”: “60%”, “C”: “71%”, “D”: “80%”}, “C”), (“What causes the movement of ocean currents as explained in the text?”, {“A”: “The sun’s heat”, “B”: “The moon’s gravitational pull”, “C”: “Wind, temperature differences, and Earth’s rotation”, “D”: “Rainfall”}, “C”), (“Which of the following is an important effect of ocean currents?”, {“A”: “They increase water pollution”, “B”: “They regulate the Earth’s climate”, “C”: “They increase salinity”, “D”: “They stop marine life from migrating”}, “B”), (“What is one consequence of warm ocean currents on coastal areas?”, {“A”: “Cooler climate”, “B”: “Higher rainfall and warmer climate”, “C”: “Increased fish population”, “D”: “Lower sea levels”}, “B”), (“What natural phenomenon is influenced by ocean currents and winds?”, {“A”: “Tsunamis”, “B”: “Cyclones”, “C”: “Earthquakes”, “D”: “Volcanic eruptions”}, “B”), (“What is a significant factor that influences the movement of tides?”, {“A”: “Earth’s rotation”, “B”: “The gravitational pull of the moon”, “C”: “Wind currents”, “D”: “Sunlight”}, “B”), (“What are spring tides, as described in the text?”, {“A”: “Tides that occur during spring season”, “B”: “High tides formed when the Earth, the moon, and the sun are in a straight line”, “C”: “Low tides formed during winter”, “D”: “Tides caused by wind patterns”}, “B”), (“What are neap tides?”, {“A”: “Low tides that occur when the sun and moon are at right angles to the Earth”, “B”: “High tides that occur during a solar eclipse”, “C”: “Tides that rise higher than usual”, “D”: “Tides influenced by earthquakes”}, “A”), (“Which of the following is a positive impact of tidal energy, as mentioned in the document?”, {“A”: “It pollutes the ocean”, “B”: “It causes floods”, “C”: “It is a renewable source of energy”, “D”: “It leads to higher fish mortality”}, “C”), (“What causes the differences between spring tides and neap tides?”, {“A”: “The position of the moon relative to the Earth and the sun”, “B”: “The amount of rainfall”, “C”: “The size of ocean waves”, “D”: “Changes in Earth’s rotation”}, “A”), (“What is a major impact of overfishing on marine life, as mentioned in the text?”, {“A”: “Increased fish population”, “B”: “Disruption of marine ecosystems and depletion of fish species”, “C”: “Improved biodiversity”, “D”: “Increased water pollution”}, “B”), (“What is one of the solutions mentioned to prevent overfishing?”, {“A”: “Allowing more fishing boats”, “B”: “Enforcing fishing limits and regulations”, “C”: “Using larger fishing nets”, “D”: “Increasing fish farming”}, “B”), (“How does plastic waste in oceans affect marine organisms?”, {“A”: “It helps them grow faster”, “B”: “It causes harm by entangling or being ingested by marine life”, “C”: “It increases oxygen levels”, “D”: “It improves water quality”}, “B”), (“What is a ‘dead zone’ in an ocean, as described in the text?”, {“A”: “An area with very high fish population”, “B”: “A zone where there is little to no oxygen, leading to the death of marine life”, “C”: “A region with high tides”, “D”: “An area with no saltwater”}, “B”), (“Which human activity is largely responsible for creating dead zones in the ocean?”, {“A”: “Fishing”, “B”: “Agricultural runoff containing fertilizers”, “C”: “Tourism”, “D”: “Underwater mining”}, “B”), (“What is the term used for the large system of rotating ocean currents, primarily driven by global wind patterns?”, {“A”: “Tsunami”, “B”: “Ocean gyres”, “C”: “Spring tides”, “D”: “Neap tides”}, “B”), (“Which ocean current is responsible for bringing warm water from the Gulf of Mexico to the North Atlantic?”, {“A”: “Kuroshio Current”, “B”: “California Current”, “C”: “Gulf Stream”, “D”: “Humboldt Current”}, “C”), (“What is the primary cause of coral bleaching, as mentioned in the text?”, {“A”: “Overfishing”, “B”: “Rise in sea temperature due to global warming”, “C”: “Decrease in ocean salinity”, “D”: “Excessive rainfall”}, “B”), (“How does the El Niño phenomenon affect ocean currents and climate?”, {“A”: “It strengthens ocean currents”, “B”: “It disrupts normal ocean currents and causes extreme weather conditions”, “C”: “It cools the Earth’s surface”, “D”: “It only affects the polar regions”}, “B”), (“Which of the following is a key impact of ocean gyres on the environment?”, {“A”: “They help increase marine biodiversity”, “B”: “They collect large amounts of plastic waste, forming garbage patches”, “C”: “They create new islands”, “D”: “They prevent water pollution”}, “B”), (“What is the primary cause of rising sea levels, as mentioned in the text?”, {“A”: “Increased volcanic activity”, “B”: “Melting of polar ice caps and glaciers due to global warming”, “C”: “Decrease in ocean salinity”, “D”: “More rainfall over oceans”}, “B”), (“Which regions are most vulnerable to rising sea levels?”, {“A”: “Mountain regions”, “B”: “Coastal areas and small island nations”, “C”: “Deserts”, “D”: “Forested areas”}, “B”), (“What is one of the major consequences of rising sea levels for human populations?”, {“A”: “Increase in fish populations”, “B”: “Displacement of people living in coastal regions”, “C”: “Decreased ocean currents”, “D”: “More frequent earthquakes”}, “B”), (“Which greenhouse gas is primarily responsible for global warming and its effect on rising sea levels?”, {“A”: “Nitrogen”, “B”: “Methane”, “C”: “Carbon dioxide (CO2)”, “D”: “Oxygen”}, “C”), (“What is one way to mitigate the impact of rising sea levels, as suggested in the text?”, {“A”: “Constructing sea walls and barriers”, “B”: “Removing all trees”, “C”: “Increasing plastic production”, “D”: “Raising the ocean floor”}, “A”), (“What is desalination, as described in the text?”, {“A”: “The process of increasing ocean salinity”, “B”: “The process of removing salt from seawater to make it drinkable”, “C”: “The process of evaporating water from oceans”, “D”: “The formation of salt crystals in the ocean”}, “B”), (“What is one of the main uses of desalinated water?”, {“A”: “Agriculture”, “B”: “Transportation”, “C”: “Recreational activities”, “D”: “Construction of buildings”}, “A”), (“Which country is mentioned as being a major user of desalination technology?”, {“A”: “Canada”, “B”: “Brazil”, “C”: “Saudi Arabia”, “D”: “India”}, “C”), (“What is one of the challenges associated with desalination, according to the text?”, {“A”: “It improves marine biodiversity”, “B”: “It is energy-intensive and expensive”, “C”: “It reduces pollution in oceans”, “D”: “It increases freshwater availability without any costs”}, “B”), (“What is the potential benefit of desalination for coastal regions facing water scarcity?”, {“A”: “It can create new marine ecosystems”, “B”: “It can provide an alternative source of freshwater”, “C”: “It increases the salinity of oceans”, “D”: “It reduces the need for groundwater extraction”}, “B”) ]