Warm Up 5/2

The following water quality conditions are observed in a lake ecosystem:

high nitrite concentration

pH of 10 

low dissolved oxygen levels

temperature of 60°F

Which best describes this ecosystem?

• The ecosystem is suffering the effects of desalination.

• The ecosystem is suffering the effects of lake turnover.

•  The ecosystem is suffering the effects of eutrophication.

• The ecosystem is suffering the effects of evapotranspiration.

Which of these are abiotic elements of a desert ecosystem?

• sand

• cactus

• lizard

• scorpion

• sunlight

Which diagram BEST illustrates the flow of energy in an ecosystem?

• 
• 
• 
• 

Which of these is an environmental benefit of converting to solar energy?

• a decrease in air pollution

• an increase in the cost of energy

•  an increase in the use of fossil fuels

• a decrease in electrical energy production

Which of the samples shown represents an element?

• 1

• 2

• 3

• 4

Populations of wolves and rabbits in an ecosystem are represented by the graph.

Which best explains the relationship between wolves and rabbits in the ecosystem?

• As the number of rabbits increases, the number of wolves increases.

• As the number of rabbits increases, the number of wolves remains constant.

• As the number of rabbits decreases, the number of wolves increases.

• As the number of rabbits decreases, the number of wolves remains constant.

Petrified palm trees are found in sedimentary rock near glaciers. The presence of the petrified palm trees MOST likely provides evidence for which statement?

• There was once more water in the area

• The area was once grassland.

• The climate in the area was once tropical.

• There are active faults in the area.