Question

on how you will remember each. one term has been done for you.
term\tdefinition
fresh water
surface water
runoff\twater that flows over land and has not been absorbed into the ground
river system
watershed
groundwater
permeable
impermeable
term\tdefinition
aquifer
water table

Explanation:

Fresh water is water with low salt - content, suitable for human and most life needs. Surface water is water on the Earth's surface like lakes and rivers. A river system is a network of rivers and streams that drain an area. A watershed is the land area that drains water into a particular river, lake, or other body of water. Groundwater is water that exists underground in soil pores and fractures. Permeable refers to materials that allow water to pass through. Impermeable refers to materials that do not allow water to pass through easily. An aquifer is an underground layer of water - bearing permeable rock. The water table is the upper surface of the zone of saturation.

Answer:

Fresh water: Water with low salt - content.
Surface water: Water on the Earth's surface (e.g., in lakes, rivers).
River system: Network of rivers and streams draining an area.
Watershed: Land area draining water into a body of water.
Groundwater: Underground water in soil pores and fractures.
Permeable: Materials allowing water passage.
Impermeable: Materials restricting water passage.
Aquifer: Underground water - bearing permeable rock layer.
Water table: Upper surface of the zone of saturation.