Aquatic Ecosystems

Temperature differences in a lake cause vertical layers to form. What is this called?

• Photic

• Aphotic

• Littoral

• Stratification

A lake is:

• Where groundwater reaches the earth's surface

• A large natural stream of flowing water

• An area where a thin layer of water covers the soil

• Where freshwater and saltwater mix

Which zone in a lake is where light can reach?

• Photic

• Aphotic

• Hypolimnion

• Metalimnion

The epilimnion is:

• The bottom layer of the lake where it is always 4 degrees C

• The middle layer where there is a steep temperature change

• The top layer, which is mixed by wind and warmed by the sun

• The layer where light does not reach

What is the littoral zone?

• The part of the lake where light doesn't reach

• The middle layer where there is a steep temperature change

• The bottom layer that is always 4 degrees C

• The shallow zone where light reaches the bottom of the lake

Tags

NGSS.MS-LS2-2

The metalimnion is:

• The bottom layer of the lake where it is always 4 degrees C

• The middle layer where there is a steep temperature change

• The top layer, which is mixed by wind and warmed by the sun

• The layer where light does not reach

Tags

NGSS.MS-ESS2-4

The hypolimnion is:

• The bottom layer of the lake where it is always 4 degrees C

• The middle layer where there is a steep temperature change

• The top layer, which is mixed by wind and warmed by the sun

• The layer where light does not reach

Which zone in a lake is where light cannot reach?

• Photic

• Aphotic

• Epilimnion

• Metalimnion

Which of the following is NOT a factor that determines which organisms live in which area of the water?

• temperature

• oxygen

• watershed

• nutrients

Tags

NGSS.MS-LS2-4

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is an indicator species?

• A species that indicates the temperature of an ecosystem

• A species that is vital to the ecosystem

• A species whose presence or absence indicates the health of an ecosystem

• A species that can live in very polluted areas