Explore key concepts of evaporation, condensation, and the water cycle for AISSEE Class 6 GK preparation. Learn important questions and answers to boost your knowledge for the Sainik School Entrance Exam preparation with ANAND CLASSES.
The concepts of evaporation, condensation, and the water cycle are essential topics in General Knowledge for the All India Sainik Schools Entrance Examination (AISSEE) Class 6. Below are some important questions and answers to help students understand these topics effectively.
Evaporation, Condensation, and Water Cycle Study Material for All India Sainik Schools Entrance Examination (AISSEE) Class 6 GK Section
1. Evaporation: What is it and how does it work?
Definition:
Evaporation is the process by which water changes from a liquid to a gas due to heat.
How It Happens:
- When the Sun heats up the water in oceans, lakes, rivers, and ponds, the water molecules gain energy and turn into water vapor (a gas).
- This water vapor rises into the air, where it becomes part of the atmosphere.
Examples:
✅ Clothes drying in the sun.
✅ Water in a glass disappearing if left out for a long time.
✅ Wet roads drying after rainfall.
2. Condensation: The Opposite of Evaporation
Definition:
Condensation is the process by which water vapor cools down and changes back into liquid form.
How It Happens:
- As the water vapor rises higher into the sky, the temperature becomes cooler.
- The water vapor then condenses into tiny water droplets, forming clouds.
Examples:
✅ Water droplets forming on the outside of a cold glass of juice.
✅ Fog appearing on a bathroom mirror after a hot shower.
✅ Dew drops on grass early in the morning.
3. The Water Cycle: Nature’s Way of Recycling Water
The Water Cycle (Hydrological Cycle) is a continuous movement of water on, above, and below the Earth’s surface. It involves the following steps:
1️⃣ Evaporation: Water changes into vapor due to heat.
2️⃣ Condensation: Water vapor cools and forms clouds.
3️⃣ Precipitation: Water falls back to Earth as rain, snow, sleet, or hail.
4️⃣ Collection: Water gathers in oceans, rivers, lakes, or underground.
This cycle repeats continuously and ensures that water is available for all living beings.
4. Importance of the Water Cycle
✅ Maintains Earth’s climate and temperature balance.
✅ Provides fresh water for drinking, agriculture, and industry.
✅ Helps in the formation of clouds and rainfall.
✅ Supports plant and animal life.
Frequently Asked Questions (FAQs)
Q1: What causes evaporation?
🔹 Heat from the sun or any heat source causes evaporation.
Q2: Why do clouds form?
🔹 When warm water vapor cools, it condenses to form tiny water droplets, which together make clouds.
Q3: What is precipitation?
🔹 When the water droplets in clouds become too heavy, they fall as rain, snow, or hail.
Q4: Can evaporation happen without heat?
🔹 Yes, but it happens very slowly. Heat speeds up the process.
Q5: Why is the water cycle important for humans?
🔹 It helps us get fresh drinking water and supports farming and ecosystems.
Question-Answer for Sainik School Exam Class 6 GK Section of Evaporation, Condensation and Water Cycle
1. What is evaporation?
Answer: Evaporation is the process in which a liquid changes into vapor or gas due to the application of heat. For example, water from lakes, rivers, and oceans evaporates due to the sun’s heat.
2. What is condensation?
Answer: Condensation is the process by which water vapor in the air cools down and changes back into liquid form. This process is responsible for the formation of clouds, dew, and fog.
3. What are the main processes of the water cycle?
Answer: The water cycle consists of four main processes:
- Evaporation: Water turns into vapor due to heat.
- Condensation: Water vapor cools and turns into liquid.
- Precipitation: Water falls back to Earth as rain, snow, or hail.
- Collection: Water gathers in oceans, lakes, and rivers, restarting the cycle.
4. Why does evaporation occur faster in hot weather?
Answer: In hot weather, the temperature is high, which provides more heat energy to water molecules, allowing them to escape into the air as vapor more quickly.
5. What is the role of the sun in the water cycle?
Answer: The sun is the main source of energy that drives the water cycle. It provides heat that causes evaporation and helps in cloud formation through condensation.
6. How are clouds formed?
Answer: Clouds form when water vapor in the air cools and condenses into tiny droplets of water, which group together to form clouds.
7. What is precipitation?
Answer: Precipitation is the process in which condensed water in clouds falls back to Earth in the form of rain, snow, sleet, or hail.
8. What happens to rainwater after it falls on the ground?
Answer: Rainwater either seeps into the ground to replenish groundwater, flows into rivers and lakes, or evaporates back into the atmosphere.
9. Can evaporation happen without heat?
Answer: Yes, evaporation can occur at all temperatures, but heat speeds up the process. Even in cooler weather, evaporation occurs slowly.
10. What is the importance of the water cycle?
Answer: The water cycle is essential for maintaining life on Earth. It distributes water across different regions, supports plant and animal life, and regulates temperature.
11. How does water from plants contribute to the water cycle?
Answer: Plants lose water through a process called transpiration, where water evaporates from their leaves into the atmosphere, contributing to the water cycle.
12. What is the difference between evaporation and boiling?
Answer: Evaporation occurs at any temperature and only on the surface of a liquid, while boiling happens at a specific temperature (boiling point) and throughout the liquid.
13. What factors affect the rate of evaporation?
Answer: The rate of evaporation is affected by:
- Temperature: Higher temperatures increase evaporation.
- Wind speed: More wind increases evaporation.
- Surface area: A larger surface area increases evaporation.
- Humidity: Higher humidity decreases evaporation.
14. What is fog and how is it formed?
Answer: Fog is tiny water droplets suspended in the air near the ground, formed when warm, moist air cools down and condenses.
15. What is the difference between dew and frost?
Answer: Dew forms when water vapor condenses on cool surfaces, while frost forms when the temperature is below freezing, causing water vapor to turn into ice.
16. Why do wet clothes dry faster on a windy day?
Answer: Wind carries away water vapor from the clothes, increasing the rate of evaporation and making them dry faster.
17. How does groundwater get replenished?
Answer: Groundwater is replenished when rainwater seeps into the soil and collects in underground reservoirs through a process called infiltration.
18. What would happen if there was no water cycle?
Answer: Without the water cycle:
- There would be no rain, leading to droughts.
- Water sources like rivers and lakes would dry up.
- Plants and animals would not get the water they need to survive.
19. Can condensation happen inside houses?
Answer: Yes, condensation can happen inside homes when warm, moist air touches cold surfaces, like windows or walls, forming water droplets.
20. How does the water cycle help in weather changes?
Answer: The water cycle affects weather by creating clouds, leading to rainfall, snowfall, storms, and humidity levels, which influence climate patterns worldwide.
21. What is sublimation in the water cycle?
Answer: Sublimation is the process where ice or snow directly changes into water vapor without becoming liquid. This happens in very cold, dry conditions.
22. What is the difference between mist and fog?
Answer: Mist and fog are both formed by tiny water droplets in the air, but mist is thinner and allows more visibility, while fog is denser and reduces visibility.
23. What is runoff in the water cycle?
Answer: Runoff is the movement of water over the surface of the land, usually after rain, flowing into rivers, lakes, and oceans.
24. How does deforestation affect the water cycle?
Answer: Cutting down trees reduces transpiration, leading to less moisture in the air, which can result in lower rainfall and drier climates.
25. What is an aquifer?
Answer: An aquifer is an underground layer of water-bearing rock that stores groundwater, which can be accessed through wells.
26. What is the difference between groundwater and surface water?
Answer: Groundwater is stored beneath the Earth’s surface in aquifers, while surface water includes rivers, lakes, and oceans.
27. What is a watershed?
Answer: A watershed is an area of land where all the water drains into a common water body like a river, lake, or ocean.
Do You Know?
✅ The water cycle is also called the hydrological cycle.
✅ Water vapor is an invisible gas, but when it condenses, it forms visible clouds.
✅ Around 97% of Earth’s water is in the oceans, and only 3% is freshwater.
More Advanced Questions for Sainik School Entrance Exam
1. What is the difference between infiltration and percolation?
Answer: Infiltration is the process by which water seeps into the ground from the surface, while percolation is the movement of water through soil and rock layers to reach underground water reservoirs.
2. What are the different forms of precipitation?
Answer: The different forms of precipitation include:
- Rain: Liquid water droplets falling from clouds.
- Snow: Ice crystals that form when water vapor freezes.
- Hail: Ice pellets that form in storm clouds.
- Sleet: Partially frozen rain that falls as ice pellets.
3. What is a water table?
Answer: The water table is the upper level of groundwater in an area, marking the boundary between water-saturated ground and dry ground.
4. How do human activities impact the water cycle?
Answer: Human activities impact the water cycle in several ways:
- Deforestation: Reduces transpiration and affects rainfall patterns.
- Urbanization: Increases surface runoff and reduces groundwater recharge.
- Pollution: Contaminates water bodies and disrupts aquatic life.
- Overuse of groundwater: Lowers the water table and leads to droughts.
5. What are water conservation methods?
Answer: Some methods of water conservation include:
- Rainwater harvesting: Collecting rainwater for later use.
- Drip irrigation: Using minimal water for farming.
- Fixing leaks: Preventing water wastage in homes.
- Recycling water: Treating and reusing wastewater.
6. What is the importance of wetlands in the water cycle?
Answer: Wetlands play a crucial role in the water cycle by:
- Storing excess rainwater and preventing floods.
- Recharging groundwater supplies.
- Filtering pollutants and improving water quality.
- Supporting biodiversity by providing habitat for many species.
7. How does air pressure influence the water cycle?
Answer: Air pressure affects cloud formation and precipitation. Low air pressure allows warm air to rise, cool, and form clouds, leading to rain. High air pressure prevents cloud formation and results in dry weather.
8. What is capillary action in relation to water movement?
Answer: Capillary action is the process by which water moves through small spaces in soil and plant roots against gravity. It helps plants absorb water from the ground.
9. How does the ocean contribute to the water cycle?
Answer: The ocean contributes to the water cycle by:
- Providing the largest source of evaporation.
- Storing heat energy and influencing weather patterns.
- Supporting precipitation by forming clouds over large water bodies.
10. How does the water cycle help in climate regulation?
Answer: The water cycle regulates climate by:
- Distributing heat through ocean currents and evaporation.
- Controlling humidity and rainfall patterns.
- Reducing temperature extremes through cloud cover and precipitation.
11. What is the role of transpiration in the water cycle?
Answer: Transpiration is the process by which water evaporates from the leaves of plants into the atmosphere. It helps in maintaining humidity and contributes to cloud formation.
12. Why does ice float on water?
Answer: Ice floats on water because it is less dense than liquid water. When water freezes, its molecules arrange in a way that creates more space, making ice lighter than liquid water.
13. How does wind speed affect evaporation?
Answer: Higher wind speeds increase evaporation by moving the water vapor away from the surface, allowing more liquid to evaporate.
14. What is the difference between evaporation and transpiration?
Answer:
- Evaporation occurs from water bodies like lakes, rivers, and oceans.
- Transpiration happens in plants, where water escapes through tiny pores in leaves.
15. What is groundwater recharge?
Answer: Groundwater recharge is the process where water from rain, rivers, or melted snow seeps into the ground and replenishes underground water sources.
16. What is condensation nuclei?
Answer: Condensation nuclei are tiny particles like dust or smoke in the air that help water vapor condense to form clouds.
17. Why do we see water droplets on the outside of a cold glass?
Answer: This happens due to condensation. The moisture in the warm air around the glass cools down and turns into liquid water droplets.
18. What is the effect of deforestation on rainfall?
Answer: Deforestation reduces transpiration, which lowers humidity and decreases rainfall, leading to droughts.
19. What is sublimation?
Answer: Sublimation is when a solid (like ice or snow) turns directly into gas without becoming liquid first. It occurs in extremely cold and dry conditions.
20. What is the difference between fog and clouds?
Answer: Fog is a type of cloud that forms close to the ground, while clouds form at higher altitudes in the sky.
21. How does altitude affect evaporation?
Answer: At higher altitudes, air pressure is lower, which can cause water to evaporate more quickly due to reduced atmospheric resistance.
22. What is desalination, and how is it related to the water cycle?
Answer: Desalination is the process of removing salt from seawater to make it drinkable. It mimics evaporation and condensation, two key parts of the water cycle.
23. How does urbanization affect the water cycle?
Answer: Urbanization increases surface runoff due to concrete surfaces, reduces groundwater recharge, and contributes to water pollution, disrupting the natural water cycle.
24. Why does a puddle of water disappear after some time?
Answer: A puddle disappears due to evaporation, where the water changes into vapor and mixes with the air.
25. What is the impact of climate change on the water cycle?
Answer: Climate change intensifies the water cycle, leading to increased evaporation, more extreme weather events like floods and droughts, and changes in precipitation patterns.
26. What is the difference between humidity and precipitation?
Answer:
- Humidity refers to the amount of water vapor in the air.
- Precipitation is water falling from the atmosphere as rain, snow, sleet, or hail.
27. What are the main sources of freshwater on Earth?
Answer: Freshwater sources include rivers, lakes, glaciers, underground aquifers, and rainfall.
28. Why does dew form on grass in the morning?
Answer: Dew forms when warm air cools at night, causing water vapor to condense into tiny droplets on grass and other surfaces.
29. How do animals contribute to the water cycle?
Answer: Animals contribute through respiration and perspiration, releasing water vapor into the atmosphere. They also influence soil moisture through their movements and activities.
30. What is water vapor, and why is it important?
Answer: Water vapor is the gaseous form of water in the atmosphere. It is important because it contributes to cloud formation, precipitation, and the regulation of Earth’s temperature.
31. What is the difference between runoff and infiltration?
Answer:
- Runoff is the movement of water over the Earth’s surface into rivers, lakes, and oceans.
- Infiltration is the process by which water seeps into the soil and replenishes groundwater.
32. How do glaciers contribute to the water cycle?
Answer: Glaciers store freshwater as ice. When they melt, the water flows into rivers and lakes, contributing to the water cycle through runoff and evaporation.
33. Why does warm air hold more moisture than cold air?
Answer: Warm air has more energy, which allows it to hold more water vapor before reaching saturation and condensing into clouds or precipitation.
34. What is the relationship between the water cycle and the carbon cycle?
Answer: The water cycle transports water that helps plants grow, enabling photosynthesis, which plays a key role in the carbon cycle by absorbing carbon dioxide from the atmosphere.
35. What is a watershed, and why is it important?
Answer: A watershed is an area of land where all the water drains into a common water body, such as a river or lake. It is important for managing water resources and preventing floods.
36. Why do some regions receive more rainfall than others?
Answer: Rainfall distribution depends on factors like temperature, wind patterns, geographical location, and the presence of water bodies that influence evaporation and condensation.
37. How does deforestation impact the groundwater level?
Answer: Deforestation reduces transpiration and infiltration, leading to lower groundwater levels and increased surface runoff, which can cause soil erosion and water scarcity.
38. What is fog, and how is it formed?
Answer: Fog is a cloud that forms near the ground when warm, moist air cools and condenses into tiny water droplets, reducing visibility.
39. What role do oceans play in regulating Earth’s temperature?
Answer: Oceans absorb and store heat from the sun, helping to regulate global temperatures. Ocean currents also distribute heat around the planet, influencing climate and weather patterns.
40. What is the significance of groundwater in the water cycle?
Answer: Groundwater serves as a crucial water source for drinking, irrigation, and industries. It is replenished through infiltration and contributes to the water cycle by feeding rivers, lakes, and springs.
41. How does precipitation affect the water cycle?
Answer: Precipitation, in the form of rain, snow, or hail, returns water from the atmosphere to the Earth’s surface, replenishing water bodies and maintaining the water cycle.
42. What is the process of water purification in nature?
Answer: Nature purifies water through filtration in soil, evaporation, and condensation in the atmosphere, which removes impurities and makes water clean.
43. What is the difference between a spring and a well?
Answer:
- Spring: A natural water outlet where groundwater flows to the surface.
- Well: A man-made hole drilled into the ground to access groundwater.
44. How does wind affect cloud formation?
Answer: Wind moves water vapor across the sky, helping in cloud formation by pushing moist air into cooler regions where condensation occurs.
45. What is a drought, and how is it related to the water cycle?
Answer: A drought is a long period of insufficient rainfall, causing water shortages. It disrupts the water cycle by reducing precipitation and groundwater levels.
46. What happens to water in a closed container over time?
Answer: In a closed container, water still evaporates but cannot escape, leading to condensation on the container’s surface, creating a mini water cycle.
47. How do plants help in maintaining the water cycle?
Answer: Plants release water vapor through transpiration, contributing to humidity and cloud formation, which eventually leads to precipitation.
48. What is the difference between sleet and hail?
Answer:
- Sleet: Small ice pellets that form when raindrops freeze before reaching the ground.
- Hail: Larger ice chunks that form in storm clouds due to repeated freezing and layering.
49. Why does condensation occur on a bathroom mirror after a hot shower?
Answer: The warm, moist air from the shower cools when it touches the cold mirror, causing condensation and forming water droplets.
50. How do rivers contribute to the water cycle?
Answer: Rivers transport water from precipitation and runoff to lakes, seas, and oceans, where it evaporates and re-enters the water cycle.
51. How do oceans contribute to the formation of clouds?
Answer: Oceans provide a large amount of water for evaporation. The evaporated water rises into the atmosphere, cools, and condenses to form clouds.
52. What role do mountains play in the water cycle?
Answer: Mountains help in cloud formation by forcing warm air to rise, cool, and condense into precipitation. They also store water in the form of glaciers and snow.
53. What is permafrost, and how does it affect the water cycle?
Answer: Permafrost is permanently frozen ground found in polar regions. It slows the infiltration of water into the soil, affecting groundwater recharge and runoff.
54. Why do puddles dry up faster on a hot, windy day?
Answer: High temperature increases evaporation, and wind moves away the evaporated water vapor, allowing more liquid to evaporate quickly.
55. What is the role of aquifers in the water cycle?
Answer: Aquifers are underground layers of rock or sediment that store water. They supply groundwater to wells and springs and play a key role in maintaining water availability.
56. How does pollution affect the water cycle?
Answer: Pollution contaminates water bodies, affecting evaporation, precipitation, and overall water quality, leading to acid rain and other environmental issues.
57. What is an estuary, and why is it important in the water cycle?
Answer: An estuary is a region where freshwater from rivers meets saltwater from the ocean. It plays a key role in nutrient exchange and supports diverse marine life.
58. Why does morning dew form on leaves and grass?
Answer: Dew forms when the air near the ground cools overnight, causing water vapor to condense into tiny droplets on leaves and grass.
59. What is an artesian well, and how does it differ from a regular well?
Answer: An artesian well taps into a confined aquifer where water is under pressure, allowing it to rise naturally without a pump. A regular well requires a pump to extract water.
60. How do animals contribute to the movement of water in the water cycle?
Answer: Animals drink water, release moisture through respiration and excretion, and contribute to soil moisture by burrowing and other activities.
61. How does the sun influence the water cycle?
Answer: The sun provides heat energy, which causes evaporation of water from oceans, rivers, and lakes, playing a crucial role in driving the entire water cycle.
62. What is the difference between condensation and precipitation?
Answer:
- Condensation is the process where water vapor cools and forms tiny liquid droplets, leading to cloud formation.
- Precipitation is when these condensed water droplets grow larger and fall to the Earth’s surface as rain, snow, sleet, or hail.
63. What is the difference between fresh water and salt water?
Answer:
- Fresh water has low salt content and is found in rivers, lakes, and glaciers.
- Salt water contains a high concentration of salt and is found in oceans and seas.
64. What are the main storage locations of water in the water cycle?
Answer: Water is stored in oceans, rivers, lakes, glaciers, underground aquifers, clouds, and living organisms.
65. What is the significance of rainwater harvesting?
Answer: Rainwater harvesting helps in conserving water by collecting and storing rainwater for future use, reducing water scarcity and dependency on groundwater.
66. How does vegetation influence the water cycle?
Answer: Plants release water into the atmosphere through transpiration, which increases humidity and contributes to cloud formation and precipitation.
67. What happens when groundwater levels drop too low?
Answer: Low groundwater levels lead to water shortages, drying of wells, reduced river flow, land subsidence, and ecosystem imbalances.
68. How do water bodies regulate Earth’s temperature?
Answer: Large water bodies absorb heat during the day and release it slowly at night, helping to moderate temperature variations and maintain a stable climate.
69. What is the difference between a lake and a reservoir?
Answer:
- Lake: A natural water body that collects rainwater, river inflow, or groundwater.
- Reservoir: A man-made or natural lake used for storing water for drinking, irrigation, or power generation.
70. How does fog affect visibility?
Answer: Fog consists of tiny water droplets suspended in the air, which scatter light and reduce visibility, making it difficult to see objects clearly.
71. What is the role of clouds in the water cycle?
Answer: Clouds store water in the form of tiny droplets or ice crystals. They move with the wind and release precipitation when the water droplets combine and become heavy.
72. What are the different forms of precipitation?
Answer: Precipitation occurs in different forms, including rain, snow, sleet, and hail, depending on temperature and atmospheric conditions.
73. How does air pressure affect the water cycle?
Answer: Low air pressure allows warm air to rise, cool, and condense into clouds, increasing the chances of precipitation. High air pressure usually leads to dry and clear weather.
74. What is capillary action, and how is it related to the water cycle?
Answer: Capillary action is the process by which water moves through small spaces in soil and plants against gravity. It helps in the absorption of water by plant roots, supporting transpiration.
75. Why does water from wet clothes dry faster on a sunny day?
Answer: The heat from the sun increases the rate of evaporation, causing water molecules to escape from the clothes into the air more quickly.
76. How do human activities impact the water cycle?
Answer: Deforestation, pollution, urbanization, and excessive groundwater usage disrupt the natural water cycle, leading to climate changes and water shortages.
77. What is acid rain, and how does it form?
Answer: Acid rain occurs when pollutants like sulfur dioxide and nitrogen oxides mix with water vapor in the atmosphere, forming acidic precipitation that harms the environment.
78. What is the difference between groundwater and surface water?
Answer:
- Groundwater is water stored underground in soil and rock layers.
- Surface water includes rivers, lakes, and oceans found on Earth’s surface.
79. Why do deserts have less cloud cover and rainfall?
Answer: Deserts have dry air with low humidity, which reduces cloud formation and precipitation, resulting in low rainfall.
80. How does the water cycle help maintain Earth’s balance?
Answer: The water cycle distributes water across different parts of the Earth, regulating temperature, supporting plant and animal life, and replenishing freshwater sources.
81. What is the role of transpiration in the water cycle?
Answer: Transpiration is the process by which plants release water vapor from their leaves into the atmosphere. It helps maintain humidity and contributes to cloud formation.
82. What causes fog to form over water bodies in the morning?
Answer: Fog forms when warm, moist air from the water body comes in contact with cooler air, causing condensation and the formation of tiny water droplets.
83. How does groundwater get replenished?
Answer: Groundwater is replenished through precipitation, infiltration of rainwater, and percolation of surface water into underground aquifers.
84. What is the main source of freshwater on Earth?
Answer: The main sources of freshwater include rivers, lakes, glaciers, groundwater, and rainfall.
85. Why does water boil faster at higher altitudes?
Answer: At higher altitudes, atmospheric pressure is lower, reducing the boiling point of water and making it boil faster.
86. What is the difference between mist and fog?
Answer:
- Mist: Contains tiny water droplets and reduces visibility slightly.
- Fog: Contains denser water droplets and significantly reduces visibility.
87. What happens when too much water is withdrawn from groundwater sources?
Answer: Excessive groundwater withdrawal can lead to depletion of water tables, land subsidence, and drying up of wells and springs.
88. Why do icebergs float on water?
Answer: Icebergs float because ice is less dense than liquid water due to the expansion of water molecules when frozen.
89. How do ocean currents affect weather patterns?
Answer: Ocean currents transport warm and cold water across the globe, influencing climate, weather patterns, and precipitation levels in different regions.
90. What is the impact of global warming on the water cycle?
Answer: Global warming increases evaporation, changes precipitation patterns, accelerates glacier melting, and leads to rising sea levels.
91. How does water vapor return to the Earth’s surface?
Answer: Water vapor returns to the Earth’s surface through condensation, forming clouds, which then release precipitation in the form of rain, snow, or hail.
92. What is the role of lakes and ponds in the water cycle?
Answer: Lakes and ponds store freshwater and contribute to evaporation, which helps in maintaining the water cycle.
93. How does deforestation affect rainfall?
Answer: Deforestation reduces transpiration, leading to lower humidity and fewer clouds, which ultimately decreases rainfall.
94. Why do some places have more humidity than others?
Answer: Humidity levels depend on factors like proximity to water bodies, temperature, wind patterns, and vegetation cover.
95. What is the difference between evaporation and boiling?
Answer:
- Evaporation occurs at any temperature from the surface of a liquid.
- Boiling occurs at a specific temperature when the liquid changes into vapor throughout its entire volume.
96. How does the melting of glaciers impact sea levels?
Answer: When glaciers melt, the extra water flows into oceans, increasing sea levels and potentially causing coastal flooding.
97. What is water retention, and how does soil help in it?
Answer: Water retention is the ability of soil to hold water. Soils with high organic matter and fine particles retain more water, helping plants grow and maintaining groundwater levels.
98. Why does dew form on grass in the early morning?
Answer: Dew forms when the air cools overnight, causing water vapor to condense on grass and other surfaces.
99. What is desalination, and why is it important?
Answer: Desalination is the process of removing salt from seawater to make it drinkable. It is important for providing fresh water in arid and coastal regions.
100. How do human activities speed up water pollution?
Answer: Activities like industrial waste disposal, agricultural runoff, and sewage dumping introduce harmful chemicals into water sources, causing pollution and disrupting the water cycle.
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