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The water cycle, powered by the sun, involves water moving in various forms between sources and sinks. It starts with evaporation from bodies of water, condensation into clouds, and precipitation back to the earth. This cycle also includes transpiration from plants and sublimation from ice to vapor.
In the water cycle, water continuously moves between Earth's surface and the atmosphere. This occurs through processes such as evaporation and transpiration, condensation, and precipitation. The water cycle is driven by solar energy and gravity.
Learn how water moves through Earth's ecosystems. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.
The carbon cycle involves plants taking in carbon dioxide, fixing carbon, and creating organic molecules. Animals eat plants, metabolize the molecules, and release carbon dioxide. This cycle keeps carbon circulating in the biosphere. Created by Sal Khan.
MIT+K12. Course: MIT+K12 > Unit 1. Lesson 2: Earth and space. How to discover a new planet. The science of warp drives. Glaciers with chocolate. Rock cycle.
Review your understanding of the nitrogen cycle in this free article aligned to AP standards.
Check your understanding of the water cycle in this set of free practice questions aligned to NGSS standards.
The water cycle is complex and involves state changes in water, as well as the physical movement of water through and between ecosystems. The hydrosphere is large and diverse. Water is present as a liquid on the Earth's surface and underneath the ground, as ice in the polar ice caps and glaciers, and as water vapor in the atmosphere.
This three carbon molecules, when we go into some detail here in the video on the Calvin cycle, it's called three phosphoglycerate, but that's not what the focus is on this video. The focus of this video is the enzyme that actually does the fixing of the carbon along with the RuBP.