Name _______________________________________ Date _____________________ Period _______
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Use a food web to identify and distinguish producers, consumers, and decomposers. Explain the pathway of energy
transfer through the trophic levels and the reduction of available energy at successive levels.
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Identify reactants, products and basic functions of photosynthesis.
Food Chains and Food Webs Pre-Test
1. Primary consumers are also known as
A. carnivores
B. herbivores
C. decomposers
D. scavengers
Correct Answer: B
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2. Producers make their own food by
A. using chemical energy to make carbohydrates
B. absorbing light energy to make carbohydrates
C. converting oxygen to carbon dioxide
D. breaking down organic matter to make carbon dioxide
Correct Answer: B
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3.
Which of the following organisms does NOT rely on energy from the sun to produce their own food?
A. chemosynthetic bacteria
B. an oak tree
C. phytoplankton
D. daisies
Correct Answer: A
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4. Which of the following describes the relationship between trees found in a forest and bacteria found near a
hydrothermal vent?
A. both perform chemosynthesis to make their own food
B. both perform photosynthesis to make their own food
C. both produce carbohydrates and oxygen
D. both produce carbon dioxide and oxygen
Correct Answer: C
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5.
Which is the correct order for the transfer of energy within an ecosystem?
A. producer  decomposer  herbivore  carnivore
B. carnivore herbivore  decomposer  omnivore
C. omnivore  carnivore  herbivore  primary consumer
D. producer  herbivore  carnivore  decomposer
Correct Answer: D
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6.
Which of the following describes how all consumers get their energy?
A. directly from the sun
B. from eating primary producers
C. from inorganic chemicals like hydrogen sulfide
D. from eating organisms that are living or were once living
Correct Answer: D
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7.
About 10% of energy from one trophic level is available to the next trophic level. What happens to the
remaining energy?
A. It is lost from as heat.
B. It is destroyed in chemical reactions.
C. It is converted into biomass.
D. It is absorbed during cellular respiration.
Correct Answer: A
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8.
How much energy is available at the third trophic level if the first trophic level has 250,000 kilocalories of
available energy?
A. 250,000 kilocalories
B. 25,000 kilocalories
C. 2,500 kilocalories
D. 250 kilocalories
Correct Answer: C
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9.
Which organism in this forest food web has the least
amount of energy available>
A. rabbit
B. kite
C. jackal
D. lion
Correct Answer: D
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10. Which of the following is a correct food chain in the forest
food web?
A. tree  rabbit  jackal  lion
B. tree  rabbit  goat  jackal
C. lion  jackal  goat  tree
D. tree  snake  kite  lion
Correct Answer: C
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