Ecosystem

How has man influenced the carbon cycle and increased the amount of carbon in the atmosphere?

• burning oil

• burning coal

• cutting down trees

• all of the above

All of the nitrogen cycle processes are performed by

         

• decomposers

• plants

• animals

• bacteria

What is almost always the first link (trophic level 1) in a food chain?

• predator

• producer

• secondary consumer

• primary consumer

  Which part of the carbon cycle occurs when plants convert sunlight and C02 into oxygen and sugar?

• combustion

• decay

• respiration

• photosynthesis

A food chain and food web represents which level of the ecology model?

• biome

• ecosystem

• community

• population

Which in the food chain is the decomposer?

• worm

• crab

• salmon

• shrimp

Why is carbon such an important element?

• carbon is a key element in producing electricity

• without carbon the Sun would run out of energy

• carbon is the central element to all living organisms

•   All of the above

Which is NOT a form of nitrogen found in the nitrogen cycle?

• nitrates

• nitrites

• ammonia

• carbonate

How would you label the robin in the food chain below?

Oak tree → Caterpillar → Robin → Hawk

• producer

• secondary consumer

• primary consumer

• herbivore

Which food chain is correct?

a. Plant -> carnivore -> herbivore -> omnivore -> predator

b. Plant -> herbivore -> omnivore -> carnivore -> predator

c. Producer -> omnivore -> herbivore -> omnivore -> predator

d. Producer -> carnivore -> carnivore -> omnivore -> predator

• A

• B

• C

• D