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Test Friday!!
Study workbooks, textbook, vocab, packet 3.3
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Trophic level pyramid
• When filling in your pyramid, in order to know which trophic level an organism goes in, you need to know WHAT the organism ate, all the way back down the food chain.
• Example 1: A bug eats some algae. The bug is a __________ consumer. (primary)
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Trophic level pyramid
• Example 2: A fish eats a bug that ate some algae. The fish is a ________________ consumer.
(secondary)
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Trophic level pyramid
• Example 3: A bird eats a fish that ate a bug that ate some algae. The bird is a ____________ consumer(tertiary)
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Trophic level pyramid
• Example 4: A bird eats a bug that ate some algae. The bird is a __________________ consumer.
(secondary)
•*Some animals can fill in more than 1 trophic level
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Trophic level pyramid
• Example 5: A bobcat eats a bird that ate a fish that ate a bug that ate some algae. The bobcat is a _________________ consumer.(quaternary)
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Review of 3.3 – PAGE 2
• 1. What travels through a food chain or web?
• Energy (or biomass)
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Review of 3.3
• 2. What is the ultimate energy source for all life on Earth?
• Sunlight (or chemical energy)
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Review of 3.3
• 3. Food chains start with what?
• Producers (Autotrophs)
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Review of 3.3
• 4. The 1st organism in a food chain must always be what type of organism?
• Primary producers
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Review of 3.3
• 5. Name 2 food making processes
• Photosynthesis, chemosynthesis
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Review of 3.3
• 6. Where do chemosynthetic bacteria get their energy?
• Chemicals found in hydrothermal vents
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Review of 3.3
• 7. Define herbivore.
• Animal that eats only plants or plant products (seeds, leaves, stems, roots)
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• 8. Herbivores are also called…
• Primary consumers
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• 9. What are animals called that feed on herbivores?
• Secondary consumers (can we say if they are omnivores or carnivores?)
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• 10. Secondary consumers are eaten by larger ______________.
• predators
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• 11. _________ consumers eat secondary consumers.
• Tertiary
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• 12. Make a food chain with a producer and 3 consumers
• Grass Grasshopper Rat Snake
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REVIEW PAGE 4
• 1. What is used to indicate the flow of energy in a food chain or web?
• Arrows
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• 2. What happens to energy as we move from step to step in a chain or web?
• It is transferred, and some energy is lost
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• 3. Define food web
• A network of many food chains
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Review of 3.3
• 4. What is meant by “trophic levels”?
• The position an organism holds in a food chain or web
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Review of 3.3
• 5. Define autotroph
• Organisms that make their own food from sunlight or chemical energy from deep sea vents
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Review of 3.3
• 6. The 1st trophic level consists of ____ producers called ____.
• Primary producers, autotrophs
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Review of 3.3
• 7. Name the 2nd trophic level (both names)
• Primary consumers, herbivores
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Review of 3.3• 8. Secondary consumers may be ____
eating meat or _____ that eat both plants and animals.
• Carnivores, omnivores
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Review of 3.3
• 9. What is the 3rd trophic level called?
• Secondary consumers
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Review of 3.3
• 10. What is the 4th trophic level called?
• Tertiary consumers
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Review of 3.3
• 11. At the 5th trophic level would be _____ consumers that eat _____ consumers.
• Quaternary, tertiary
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Review of 3.3
• 12. Give an example of 3 detritivores. On what do they feed?
• Worms, shrimp, snails, mites
• Feed on already decayed organisms
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Review of 3.3
• 13. What organism feeds on dead plants and animals and helps recycle them?
• Decomposers
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Review of 3.3
• 14. Both _____ and ______ act as decomposers• Bacteria and fungi
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Review 3.3
• 15. Can an organism fill more than one trophic level--- yes or no? Give an example
• Yes – an organism like a raccoon (last page food web) is listed as a tertiary consumer, but it can also be considered a secondary consumer if it eats a primary consumer (a tiny fish, grub, or grasshopper)
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Page 5 Review• 1. In food chains and webs, what trophic level
must you have more of than others?• Producers!• 2. Each trophic level has how much LESS energy?• 10% less• 3. What may happen if a species goes extinct?• It affects the entire food web (think of your
food web activity)
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Review of 3.3
• A plant is …
A. An autotroph
B. A heterotroph
C. A primary producer
D. A and C
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Review of 3.3
• A person who eats a chicken that ate grain is a…
A. Primary producer
B. Primary consumer
C. Secondary consumer
D. Tertiary consumer
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Review of 3.3
• Primary consumers eat
A. Primary producers
B. Primary consumers
C. Secondary consumers
D. Quaternary consumers
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Review of 3.3
• A cow is a
A. Primary consumer
B. Heterotroph
C. An herbivore
D. All of the above
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Review of 3.3
• Autotrophs…
A. Make their own food
B. Are the base of the food chain
C. Are primary producers
D. All of the above
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Review of 3.3
• A lion that eats a zebra that ate grass is…
A. A primary producer
B. a primary consumer
C. a secondary consumer
D. a quaternary consumer
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Review of 3.3
• A heterotroph…
A. is an autotroph
B. eats other organisms
C. is a primary producer
D. A and C
E. None of the above
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Review of 3.3
• A detritivore
A. is an autotroph
B. eats decomposing matter
C. kills animals
D. all of the above
E. none of the above
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Review of 3.3
• If a person eats a vegetable, the person is acting as
A. A primary producer
B. A primary consumer
C. A secondary consumer
D. A tertiary consumer
E. A quaternary consumer
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Review of 3.3
• As nutritional energy passes through the food chain, energy…
A. Is lost
B. Is gained
C. Remains constant
D. Increases then decreases
E. Decreases then increases
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Review of 3.3
• There are more primary producers than there are…
A. Primary consumers
B. Secondary consumers
C. Tertiary consumers
D. Quaternary consumers
E. All of the above
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Review of 3.3
• The network of all the inter-related food chains in a biological community is called
A. A food web
B. A food chain
C. A food pyramid
D. A ecological experiment
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Review of 3.3
• The sequence of who eats whom in a biological community is called
A. A food web
B. A food pyramid
C. A food chain
D. A trophic level
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Review of 3.3
• An organism that gets its energy by eating other organisms is called
A. An autotroph
B. A primary producer
C. A heterotroph
D. A consumer
E. C and D