4/12/2021 EOG Review (water)

they are a source of ground water

they are saltwater ecosystems

they flow down from aquifers

they drain into the ocean

the water became too warm to hold enough dissolved oxygen for the fish

Heavy rains washed soil into the river, making it too muddy for the fish

fertilizer caused too many algae to grow, and the fish died from overeating

the water became too cold, stressing the fish so that they became sick and died.

having water laws and regulations

using chemical indicators to check water quality

treating sewage to kill pathogens

letting pollutants wash out to sea