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37 Terms
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What is evaporation?
Evaporation is the phase change process in which liquid water absorbs energy from heat and transforms into water vapor (a gas). This process is crucial in the water cycle as it contributes to the moisture content of the atmosphere and occurs primarily in oceans, lakes, and rivers.
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What is condensation?
Condensation is the process by which water vapor in the atmosphere cools and changes back into liquid water. Through this process, tiny droplets cluster together to form clouds, which can eventually lead to precipitation.
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What is precipitation?
Precipitation refers to any form of water, including rain, snow, sleet, or hail, that falls from the atmosphere to the Earth's surface. This occurs when clouds become saturated with water vapor and can no longer hold it, resulting in the release of water droplets or ice crystals.
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What is runoff?
Runoff is the flow of water, often after rainfall or snowmelt, that moves over land surfaces and collects in rivers, lakes, and oceans. This process is a crucial component of the water cycle, as it redistributes water from higher elevations to lower areas, replenishing water bodies.
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What is the role of the sun in the water cycle?
The sun plays a pivotal role in the water cycle by providing the energy necessary for evaporation to occur. It heats water bodies, facilitating the transition of water from liquid to vapor, which subsequently contributes to cloud formation and precipitation.
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What is infiltration?
Infiltration is the process by which surface water enters the soil, replenishing groundwater supplies. It occurs when water seeps through soil layers, allowing it to be stored underground in aquifers, which are critical for maintaining water supply.
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What is transpiration?
Transpiration is the biological process by which water is absorbed by plant roots from the soil, travels through the plant, and is released as water vapor into the atmosphere from small openings in leaves known as stomata. This process contributes to the total moisture in the atmosphere.
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What is groundwater?
Groundwater is the water that resides beneath the Earth's surface within soil pore spaces and rock fractures. It serves as a significant source of freshwater for human consumption, agriculture, and ecosystems, and is vital for maintaining the balance of the water cycle.
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What are the effects of human activities on the water cycle?
Human activities such as urbanization, industrialization, agriculture, and deforestation can significantly disrupt the natural water cycle. These changes can lead to increased runoff, reduced infiltration, and water contamination, ultimately affecting the availability and quality of water resources.
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What is climate change's impact on the water cycle?
Climate change significantly influences the water cycle by altering precipitation patterns, increasing the frequency and intensity of storms, and raising temperatures that enhance evaporation rates. This can lead to an increase in both droughts and flooding, impacting water availability and ecosystem health.
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How do clouds form?
Clouds form when water vapor in the atmosphere cools and condenses into tiny water droplets or ice crystals. This condensation occurs around particles in the air, such as dust or pollen, which serve as nuclei for the droplets, leading to visible cloud formation.
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What is the significance of the water cycle?
The water cycle is essential for maintaining ecological balance, supporting agriculture, providing freshwater resources, influencing climate and weather patterns, and sustaining life on Earth. It ensures the continuous circulation and availability of water necessary for all living organisms.