Water+On+The+Move+Definitions

Permeable- An object that allows water to pass through. Impermeable- An object that allows no water to pass through. Porous- An object that absorbs water. Run-off- Water that travels across impermeable substances to bodies of water. Upstream- The way against water travels in a river. Downstream- The way water travels in a river. Valley- A piece of land that is lower than the rest because of erosion caused by a river. Lake- A natural body of water that is not connected to the ocean and has fresh water. Ocean- A natural body of water that is full of salt water. Flood Plain- The part of the valley that is affected by erosion most because of floods. Pesticides- A thing that is put on plants to kill harmful bugs. Sediment- The substance that is left in the water after erosion. Revitalize- To put new minerals in land that nothing can grow in. Circle of Life- The fact that every animal depends on all other animals to find food. Erosion- When rocks deteriorate by water.