Semester 2: Unit 3 Energy Flow
Directions: Please fill out this study guide with the correct answers using your lessons as a source of help. Once completed, you will upload this to your sample work dropbox for the corresponding unit.
Match the following terms with their definitions:
decomposer (U3L1/2) autotroph (U3L2) heterotroph (U3L2) producer (U3L2) consumer (U3L2)
chemosynthesis (U3L9) biomass (U3L3) trophic level (U3L3)
Word
Definition
An organism that cannot make its own food and receives its nutrients and energy by feeding on other organisms
An organism that produces its own food
The position or level of an organism on the food chain or in an energy pyramid
An organism that gets energy by breaking down the remains of dead organisms or animal waste
A process that uses chemical energy instead of light energy by converting carbon or methane into organic matter using inorganic molecules such as hydrogen sulfide or methane as an energy source
An organism that captures energy to produce its own food and provide the foundation of the food supply for other organisms
The number of organisms in a given area or volume
An organism that eats other organisms or organic matter
Answer the following questions/statements (each number should have a response):
Using the food chain below, match the organism with its trophic level. (U3L3)
____________ - Primary consumer
____________ - Producer
____________ - Tertiary consumer
____________ - Secondary consumer
Why is the sun the primary source of energy in most ecosystems? (U3L3)
Approximately how much energy is passed from one trophic level to the next? (U3L3)
How much energy would be passed from a producer containing 220,000 kilocalories of energy to the primary consumer? (U3L3)
Why are there fewer organisms at the top of the food chain? (U3L3)
_____________ and ___________ have important roles in the cycling of matter and energy in an ecosystem. The products of one are the reactants of the other. (U3L3)
Explain why both plants and animals need mitochondria. (U3L3)
Essay Questions (The following questions are VERY similar to what you will see on your test. They are NOT required for points on this study guide, but it would be very beneficial to familiarize yourself with them and use them to prepare for the test!!):
Yes/No (I know this and can explain it to a friend.)
Essay Question
Compare and contrast two different categories of heterotrophs. (U3L2)
How is the flow of energy in land-based ecosystems similar to the flow of energy in marine-based ecosystems? How are they different? (U3L3)
What role do decomposers play in ecosystems? What would happen without decomposers? (U3L3/8)
What is chemosynthesis? What type of environment does chemosynthesis take place in? Explain how matter and energy are cycled through chemosynthesis. (U3L9)
What is biomagnification? If a pesticide is sprayed on producers, how are the organisms up the food chain affected? (U3L6)
