Flashcards
Ecosystem s
Flashcards do conjunto (20)
- 1What is the difference between a food chain and a food web?- A food chain is a series of organisms that move from producer to final consumer
- A food web is a series of interrelated food chains - 2What is a producer?A producer is an organism that makes its own food using photosynthesis
- 3Chemical formula for photosynthesis6CO2 + 6H2O + SUNLIGTH =
C6H12O6 + 6O2 - 4What is a consumer?A consumer is an organism that must eat other organisms to survive
- 5Chemical Formula for cellular respirationC6H12O6 + 6O2 =
6CO2 + 6H20 + ATP - 6What is a decomposer?A decomposer is an organism that breaks down the cells of dead organisms
- 7What is the difference between a decomposer and an animal that eats dead things (scavenger) ?- A decomposer breaks down dead organisms at a cellular level
- An animal that eats dead things waits for organisms to enjoy their kill , and when they are done , the scavengers move in - 8Define : primary consumer , secondary consumer , tertiary consumer , and quaternary consumerPrimary consumer - eats producer
Secondary consumers - eat primary consumers
Tertiary consumers - eat secondary consumers
Quaternary consumers - eat tertiary consumers - 9In an energy pyramid , why is there so much energy loss from one energy level to the one above it ? What happens to the energy that does not transfer to the next level ?At each energy level , the organism must use much of the energy it receives for biological purposes. The organism then passes on a small amount (approximately 10 percent) to the next level
- 10Think about the ecosystem lab we did in class (with the beans) : - Why could an ecosystem with 2000 plants only support 200 grasshoppers - Why could the same ecosystem only support 1 or 2 hawks1 ) The plants must use much of the energy it receives for its own biological processes
2 ) Hawks are generally tertiary or quaternary consumers . They must eat larger prey ( and more of them ) in order to receive the energy they need - 11Why is the carbon cycle important?- Carbon is required to make all living things : it is in DNA
- It is in Glucose , the product of photosynthesis , which is the foundation of nearly all food webs - 12How does carbon go into the air ?Exhaled by animals as a product of cellular respiration
Plants also give off carbon dioxide during cellular respiration - 13How does carbon get out of the air?Absorbed by plants
- 14What is the role of plants in the carbon cycle ?Convert carbon dioxide into glucose
- 15what is the role of animals in the carbon cycle ?- Convert glucose into carbon dioxide
- They also return carbon to the earth when they die and decompose , and eventually turn into fossil fuels - 16Why is the nitrogen cycle important?Nitrogen is require for living things : it is in the DNA bases
- 17How does nitrogen go into the air ?Bacteria and fungi decompose dead organisms
- 18How does nitrogen get out of the air ?Lightning and bacteria
- 19Role of bacteria in the Nitrogen cycleBreaks down N2 from the air into a form of nitrogen that other organisms can use
Breaks down dead organisms and returns nitrogen to the air - 20Role of animals in the nitrogen cycleThey absorb nitrogen from plants and use it in their DNA and other functions. Then when they die , the nitrogen is returned to the soil and air