Name ______Date ______
Environmental Invaders Unit Post-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. Limpets, starfish, shark
c. Phytoplankton, algae
d. Octopus, shark, human
2. Which statement is false, according to the food web?
a. Zooplankton eat fish.
b. Starfish eat mussels and limpets.
c. Mussels are eaten by seagulls.
d. Humans eat octopus, shark, mussels, and fish.
3. Which of the following is true about mussels?
a. They eat octopus and seagulls.
b. They eat phytoplankton and algae.
c. They are eaten by octopus, starfish, seagulls, and humans, but only eat phytoplankton.
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 shark would increase.
b. The population of seagulls would decrease.
c. The population of zooplankton would increase.
d. The population of humans would decrease.
5. In a food web, what do the arrows from one organism to another represent?
a. Photosynthesis
b. The organism reproducing
c. Energy being transferred
d. Water being consumed by the organism
6. Invasive Species affect the economy only by affecting
a. Fishing
b. Tourism
c. Crops
d. All of the above – and more!
7. The invasive species always affects the economy positively
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. Total
b. Add
c. Sum
d. Difference
9. Invasive species all affect…
a. every economy differently
b. every economy the same way
c. every economy negatively
d. every economy positively
10. How could an invasive species affect you personally? What if you lived in Florida?