Watershed - Area of land found everywhere on earth that collects precipitation and drains it to the lowest elevation, Pesticides - Substance that is toxic to insects, Fertilizer  - Substance applied to plants that promotes plant growth, Herbicides  - Substance that is toxic to plants, Human Activity  - Human actions that cause damage to the environment, Non-Point Solution - Pollution coming from many small locations. Reaches water supply by runoff and cannot be controlled., Point- Source Solution - Pollution coming from a place that can be identified and then corrected, Hydrosphere - A hydrosphere is the total amount of water on a planet. The hydrosphere includes water that is on the surface of the planet, underground, and in the air., Water Cycle - Process describing how water evaporates, cools and condenses into rain or snow in clouds, and falls again to the surface as precipitation,

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