Freshwater ecosystems

Choose ALL factors that affect aquatic biodiversity.

• salinity

• water temperature

• availability of light

• availability of nutrients

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS1-5

A measure of the amount of dissolved salts in water.

• salinity

• luminosity

• eutrophication

• malleability

Water is generally warmer ....

• in the aphotic zone

• at the benthic zone

• near the equator

• near the poles

Tags

NGSS.MS-ESS2-4

The region of water where light is present.

• benthic zone

• profundal zone

• Photic zone

• Aphotic zone

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

The region of water where light cannot penetrate. Dark.

• Aphotic zone

• Photic zone

• littoral zone

• photosphere

What is a hypoxic environment?

• presence of light

• without available nutrients

• without sufficient oxygen

• increased amount of oxygen

Tags

NGSS.MS-LS2-4

What factor helps atmospheric oxygen dissolve in water?

• turbulence

• light

• salinity

• acidity

Excess nutrients from land runoff is normally in the form of ....

• pesticides

• iron and nickel

• dissolved salts

• nitrates and phosphates

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-1

Which of these are not a man-made source of excess nutrients?

• Agricultural fertilizer

• Animal waste

• wastewater sewage

• herbicides

Tags

NGSS.MS-LS2-3

What causes "dead zones"?

• excess nutrients increase algae

• increased oxygen

• absence of light

• decrease in temperature

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

NGSS.MS-LS1-5