Earth's spheres - the four subsystems that make up the planet Earth, hydrosphere - all of the waters on Earth, atmosphere - layers of gasses that surround the Earth, geosphere - all the rocks and minerals in and on the Earth, biosphere - all living things on earth, saline - containing salt, reservoir - large lake used as a source of water, system - parts that work together, drought - a long time with low rainfall that results in a shortage of water, watershed - area of land where all water drains into the same place, erosion - gradual wearing down by natural elements, reduce - make smaller, reuse - use again, recycle - make a new product from something,

Earth Systems Vocabulary

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