Watershed

Rapid growth of algae in a pond is often the result of...

• excess nutrients from fertilizer runoff

• loss of habitat due to commercial building

• clogged river tributaries entering a lake

• flooding that causes water levels to rise

The town of Winchester recently built an artificial body of water. This reservoir will store drinking water for the town. Which of the following could cause contamination of the water and lead to human health-related problems and loss of native species?

• development of a water quality plan

• improvements to a water treatment facility

• increased use of fertilizer to keep the vegetation growing

• building a fence around the reservoir

Overflow during a heavy rainstorm from a wastewater treatment plant would result in...

• weakened housing foundations

• polluted runoff into nearby ponds

• flooding in the local aquifer

• over-treated drinking water

Mrs. Pond just purchased a new house, currently her backyard is flooding every time it rains. Her landscape professional recommended an increase in the amount of vegetation. Why would he suggest this?

• Vegetation holds soil and moisture preventing the area from flooding

• plants are pretty and increases the focus on the plants and not the flooding

• Vegetation is not necessary he would like Mrs. Pond to spend more money.

• Plants are required in some Houston areas and Mrs. Pond doesn't have enough plants.

Which of the following human activities will have the greatest negative impact on the balance of organisms within ocean ecosystem?

• monitoring of major, global ocean currents

• recreational boating

• commercial fishing to provide food for humans

• mapping of the ocean floor by marine scientists

The line graph below shows the average amount of dissolved nutrients in a body of water each year from 1998 to 2003.
Which human activity most likely affected this body of water between 2000 and 2003?

• discharging warm water into the body of water
• adding chemical fertilizers to water
• burning fossil fuels
• dumping litter in the water

Overflow during a heavy rainstorm from a wastewater treatment plant would result in...

• weakened housing foundations

• polluted runoff into nearby ponds

• flooding in the local aquifer

• over-treated drinking water

Look closely at the map of the watershed below. If water enters the watershed at the top of the mountain where the arrow is pointing, at which point will it stop draining?

• Point A

• Point B

• Point C

• Point D

Which of the following models BEST represents how water flows in a watershed?

• A

• B

• C

• D

Pollutants from a factory that enter the water in a watershed will have a negative effect on which of the following?

• Local pond life

• Rainfall rates

• Direction of river flow

• Available space for crops