Eutrophication

Eutrophication is caused by...

• fossil fuel burning in power plants.

• automobiles burning fossil fuels.

• over fertilizing farm fields.

• limestone rocks in a body of water.

When nutrient levels rise to high levels in a body of water, the effect on dissolved Oxygen levels is...

• decreases.

• increases.

• does not change.

Tags

NGSS.MS-LS2-3

When algae levels increase in a body of water, it

• cuts off light to plants at the bottom.

• increases light to the plants on the bottom.

• causes dissolved Oxygen levels increase.

• causes bacteria populations decrease.

________ results in an increase of water temperature.

• water pollution

• thermal pollution

• biomagnification

• artificial eutrophication

Accumulation of pollutants at successive levels of the food chain.

• water pollution

• thermal pollution

• biomagnification

• artificial eutrophication

When phosphates in laundry detergents get into aquatic ecosystems and cause toxic pollution.

• water pollution

• thermal pollution

• biomagnification

• artificial eutrophication

The fish-eating bird in this food chain likely have the LARGEST _________.

• concentration of DDT
• amount of energy
• biomass
• numbers

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which member of the food chain is MOST affected by mercury, a fresh water pollutant?algae --> zooplankton--> small fish --> large fish --> hawk

• algae
• zooplankton
• large fish
• hawk

Tags

NGSS.MS-LS2-4

The build up of toxins in the upper levels of a food chain is called

• autrophism
• biomagnification
• heterotrophy
• respiration

Tags

NGSS.MS-LS2-3

The number one reason for deforestation?

• Logging

• Agriculture

• Urban development

• To increase biodiversity