S6E3a Water IAN 2

Salinity

salinity is the amount of salt in water.  3.5% is the salinity of the ocean

5 sources of freshwater

glaciers and ice caps, groundwater, rivers, lakes, and the atmosphere, make up 3% of Earth’s water.

1% useable

groundwater, rivers, lakes, and the atmosphere contain the 1% of the Earth’s water we can use

groundwater

most of the freshwater we can use is found underground

wetlands

absorb rainwater, help prevent flooding, filter out pollution

runoff

water from rain and melted snow that runs into river, wetlands, and oceans

infiltration

water that soaks into the ground to become groundwater.