CH 3 Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
Figure 3–2
____
1. What goes in Box 5 of the food web in Figure 3–2?
a. scavengers
b. carnivores
c. decomposers
d. herbivores
____
2. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the
remaining energy, some is used for the organism’s life processes, and the rest is
a. eliminated as heat.
b. stored as fat.
c. used in reproduction.
d. stored as body tissue.
____
3. Two clear 2L bottles are set up with thermometers. Carbon dioxide is added to one of the bottles. The
scientists asks “Does carbon dioxide affect air temperature?”. What is the dependent variable in this
experiment?
a. thermometers
c. carbon dioxide
b. bottle
d. temperature
____
4. Each of the following is an abiotic factor in the environment EXCEPT
a. temperature.
b. plant life.
c. soil type.
d. rainfall.
____
5. Carbon cycles through the biosphere in all of the following processes EXCEPT
a. photosynthesis.
b. transpiration.
c. burning of fossil fuels.
d. decomposition of plants and animals.
____
6. Which part of the water cycle is a biological process?
a.
b.
c.
d.
condensation
precipitation
transpiration
runoff
Figure 3–3
____
7. What is happening to water at B in Figure 3–3?
a. Water is being taken up by plants through transpiration.
b. Water is evaporating from the ocean.
c. Water is seeping into the ground to become groundwater.
d. Water is falling to the ground as precipitation.
____
8. Matter can recycle through the biosphere because
a. biological systems do not use up matter, they transform it.
b. matter does not change into new compounds.
c. biological systems use only carbon, oxygen, hydrogen, and nitrogen.
d. matter is assembled into chemical compounds.
____
9. What is at the base of all ecological pyramids?
a. producers
b. decomposers
c. consumers
d. scavengers
____ 10. A word that means the same thing as consumer is
a. heterotroph.
b. producer.
c. carbohydrate.
d. autotroph.
____ 11. What is the correct order of the scientific method?
a. problem, experiment, results, conclusion c. problem experiment, result, hypothesis
b. problem, hypothesis, conlusion, results
d. problem, experiemnt, hypothesis, result
____ 12. How do most primary producers make their own food?
a. by using light energy to make carbohydrates
b. by breaking down remains to make carbon dioxide
c. by using chemical energy to make carbohydrates
d. by changing water into carbon dioxide
____ 13. In what way are herbivores and carnivores alike?
a. They both are considered to be autotrophs.
b. They both use photosynthesis to make their own food.
c. They both obtain energy by consuming other organisms.
d. They both directly consume producers.
____ 14. Which of the following organisms does NOT require sunlight to live?
a. chemosynthetic bacteria
b. algae
c. trees
d. photosynthetic bacteria
____ 15. In which way are plants in a sunny mountain meadow and sulfur bacteria in a deep-sea volcanic vent alike?
a. They both use photosynthesis to make their own food.
b. They both use chemosynthesis to produce their own food.
c. They both produce carbohydrates and oxygen.
d. They both produce carbon and hydrogen.
____ 16. A model of the complex feeding interactions among organisms in a community from producers to
decomposers is called a
a. ecosystem.
b. food web.
c. population.
d. food chain.
____ 17. Animals that get energy by eating the carcasses of other animals that have been killed by predators or have
died of natural causes are called
a. heterotrophs.
b. detritivores.
c. omnivores.
d. scavengers.
____ 18. What animals eat both producers and consumers?
a. omnivores
b. herbivores
c. autotrophs
d. chemotrophs
____ 19. A bird stalks, kills, and then eats an insect. Based on its behavior, which pair of ecological terms describes
the bird?
a. producer, heterotroph
b. carnivore, consumer
c. autotroph, herbivore
d. herbivore, decomposer
Figure 3–4
____ 20. Which of the following is a food chain in the food web shown in Figure 3–4?
a. tree, deer, mountain lion, fox
b. tree, rabbit, hawk, snake
c. grass, caterpillar, robin, hawk
d. grass, grasshopper, snake, hawk
Figure 3–1
____ 21. The algae at the beginning of the food chain in Figure 3–1 are
a. heterotrophs.
b. primary consumers.
c. primary producers.
d. decomposers.
____ 22. What is the term for each step in the transfer of energy and matter within a food web?
a. food chain
b. food pyramid
c. energy path
d. trophic level
____ 23. The repeated movement of water between Earth’s surface and the atmosphere is called
a. precipitation.
b. evaporation.
c. the water cycle.
d. the condensation cycle.
Figure 3–9
24. Interpret Visuals Explain the roles of photosynthesis and respiration in the carbon cycle. Continue on the
back of this page if you need more room to earn 10 points. (10 points)
25. Bonus-Write the chemical reaction for photosynthesis (use words or formulas).