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Date _____________
Environmental Invaders Unit Pre-test
Use the food web below to answer questions 1-4.
1. Which of the following are producers in this ecosystem?
a. Algae, limpets, octopus
b. Octopus, shark, human
c. Limpets, starfish, shark
d. Phytoplankton, algae
2. Which statement is false, according to the food web?
a. Mussels are eaten by seagulls.
b. Humans eat octopus, shark, mussels, and fish.
c. Zooplankton eat fish.
d. Starfish eat mussels and limpets.
3. Which of the following is true about mussels?
a. They are eaten by octopus, starfish, seagulls, and humans, but only eat
phytoplankton.
b. They eat octopus and seagulls.
c. They eat phytoplankton and algae.
d. They eat phytoplankton and fish, and are eaten by octopus, humans, and sharks.
4. Imagine a disease kills all of the fish in this ecosystem. Which of the following would NOT
happen as a result?
a. The population of zooplankton would increase.
b. The population of humans would decrease.
c. The population of shark would increase.
d. The population of seagulls would decrease.
5. In a food web, what do the arrows from one organism to another represent?
a. The organism reproducing
b. Energy being transferred
c. Photosynthesis
d. Water being consumed by the organism
6. Invasive Species affect the economy only by affecting
a. Tourism
b. Crops
c. Fishing
d. All of the above – and more!
7. The invasive species always affects the economy negatively
a. True
b. False
8. If you would like to add up a list of numbers in excel (or google sheets), the term you would
use is…
a. Sum
b. Total
c. Difference
d. Add
9.
Invasive species all affect…
a. every economy the same way
b. every economy negatively
c. every economy positively
d. every economy differently
10. What are ways that invasive species affect humans? Specifically, how would you
personally be affected by an invasive species?