The Water Cycle：水的循环
合集下载
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
The Water Cycle
The Water Cycle
Key Terms
• Evaporation: The process where a liquid changes into a gas when the temperature rises.
• Condensation: The process where a gas (like water vapour) changes into a liquid when the temperature lowers.
• Water is essential for life on Earth. It is recycled through the water or hydrologic cycle.
Recycling
• The water used today is from millions of years ago – it is recycled.
Key Terms
• Precipitation: After a gas, like water vapour, condenses, it may fall back to Earth in the form of rain, snow, sleet, or hail.
• Runoff: Water that collects at the Earth’s surface from precipitation. It will form rivers, lakes, and may eventually flow to an ocean.
The Water Cycle in a Nutshell
• Water, in its different forms (liquid, solid, gas) cycles continuously through the atmosphere.
– Water evaporates into the atmosphere from the land and sea.
• Infiltration: Water that seeps into the ground and may become part of the water table.
• Transpiration: Water released into the atmosphere through the leaves of plants.
– Once in tnd can condense to form clouds and precipitation, which fall back to Earth
– Plants and animals use and reuse water and release water vapour into the air.
The Water Cycle
Key Terms
• Evaporation: The process where a liquid changes into a gas when the temperature rises.
• Condensation: The process where a gas (like water vapour) changes into a liquid when the temperature lowers.
• Water is essential for life on Earth. It is recycled through the water or hydrologic cycle.
Recycling
• The water used today is from millions of years ago – it is recycled.
Key Terms
• Precipitation: After a gas, like water vapour, condenses, it may fall back to Earth in the form of rain, snow, sleet, or hail.
• Runoff: Water that collects at the Earth’s surface from precipitation. It will form rivers, lakes, and may eventually flow to an ocean.
The Water Cycle in a Nutshell
• Water, in its different forms (liquid, solid, gas) cycles continuously through the atmosphere.
– Water evaporates into the atmosphere from the land and sea.
• Infiltration: Water that seeps into the ground and may become part of the water table.
• Transpiration: Water released into the atmosphere through the leaves of plants.
– Once in tnd can condense to form clouds and precipitation, which fall back to Earth
– Plants and animals use and reuse water and release water vapour into the air.