Lakes and Ponds

Which of the following terms describes a body of water that is not flowing?

• lotic

• lentic

• lethargic

• low flow

____________ is the near shore zone where rooted plants grow.

• littoral

• light

• limnetic

• lotic

_________________ is the open water zone where rooted plants do not grow.

• littoral

• lentic

• limnetic

• lowly

_____________ is the area of the lake where there is enough light for photosynthesis.

• bright zone

• photic zone

• photosynthetic zone

• photo zone

The top (and generally warmest) layer of a lake is called the

• thermocline

• hypolimnion

• epilimnion

• thermolimnion

What is the name of the ONLY natural lake in Texas?

• Candle

• Crado

• Cato

• Caddo

Man-made lakes are not truly lentic because water still flows downstream toward the dam.

• true

• false

What causes seasonal lake turnover?

• gale-force winds every fall drive the lakes to turn over

• turnover only happens in man-made lakes because it caused by the outflow of cold water from the dam

• ice formation cools the top layer of water, causing it to sink and the bottom layer to rise

• state fishing agencies use giant pumps to circulate lakes in order to increase fish production

Why are ponds more sensitive to changes in temperature and chemical balance?

• because there is less water to absorb and diffuse those changes

• because pond organisms are more fragile than lake organisms

• because ponds are natural and lakes are man made

• because ponds are temporary, but lakes are permanent

Which of the following describes the ecological succession of a pond?

• The pond gets deeper and deeper over time as more runoff fills it up

• The pond disappears after a sudden even like a mudslide

• The pond gradually fills in over time due to sediment brought in through runoff

• Ecological succession does not happen in lentic bodies