
Trophic Cascades
Authored by Ryan Ankeny
Biology
9th - 12th Grade
NGSS covered
Used 111+ times

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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the definition of an ecosystem?
A group of animals of the same species living in the same place.
All the plants and animals living in the same place.
All organisms living in the same place and the abiotic factors that affect them.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not a biotic factor in an ecosystem?
wind
algae
dead skunk
oak tree
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which of the following would be included in a system?
inputs and outputs
boundaries
interactions
components
Tags
NGSS.MS-LS2-3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In this ecosystem model, what is missing?
plants
the top predator
abiotic factors
consumers
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the mid 1900's, the wolves of Yellowstone were deeply affected by humans and their population significantly decreased-- making them endangered, and eventually removing them completely from the Yellowstone ecosystem. The removal of wolves, the top predator, caused what to happen to the biodiversity within Yellowstone?
A trophic cascade affected the entire food web in Yellowstone, causing some organisms to experience decreases, and others to grow rapidly.
Biodiversity increased when the wolves disappeared and more species were able to flourish without the wolves.
A trophic cascade irreversibly ruined the ecosystem in Yellowstone--destroying biodiversity forever.
The biodiversity of the park was not affected when the wolves were removed.
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-1
NGSS.MS-LS2-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is NOT true of the included graphs?
The reintroduction of wolves led to a decline in the beaver population.
The reintroduction of wolves led to an increase in the elk population.
The ecosystem was healthier after wolves were reintroduced.
The reintroduction of wolves led to a decline in the bison population.
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-1
NGSS.MS-LS2-2
7.
MULTIPLE SELECT QUESTION
1 min • 1 pt
How did the kelp forest ecosystem change after sea otters were removed?
sea urchin population increased
the kelp population decreased
sea stars increased because there were more sea urchins to eat
the phytoplankton population decreased
Tags
NGSS.MS-LS2-4
NGSS.MS-LS2-1
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