Formative: Food Webs and Energy Flow
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by Cindy Jahnke
| 11 Questions
1
1 pt
If a bird eats a mouse that eats grass, the bird is a(n)
producer.
second-level consumer.
first-level consumer.
decomposer.
2
1 pt
Which of the following shows a correct food chain?
plants >decomoposers>raccoons>ospreys
insects>fish>decomposers>ospreys
plants>insects>fish>decomposers
fish>osprey>raccoons>decomposers
3
1 pt
The first organism in a food chain is typically a(n)
consumer.
herbivore.
carnivore.
producer.
4
1 pt
In an energy pyramid, which level has the most available energy?
producer level
first-level consumer level
second-level consumer level
third-level consumer level
5
1 pt
The many overlapping food chains in an ecosystem make up a(n)
food web.
niche.
energy pyramid.
feeding level.
6
1 pt
The movement of energy in an ecosystem can be shown by an energy pyramid. An energy pyramid shows the amount of energy available at each level of a food chain. A food chain is made up of grain plants, mice, snakes, and hawks. Which of the following diagrams correctly represents the energy available at each level in this food chain? [https://www.quia.com/files/quia/users/jpaydo/energy-pyramid.jpg]
A
B
C
D
Image for Question 7
7
1 pt
What most likely caused the rabbit population to decrease during the first month shown in the graph above?
A disease in the population of rabbits
A decreasing population of grasses
An increasing population of hawks
A higher-than-ideal population of snakes
Image for Question 8
8
4 pts
In one or two sentences, please summarize what the graph is telling you about gazelles and lions. (The Y-axis is the "Number of Individuals" in that ecosystem). Use specific numbers to add detail to your summary.
Image for Question 9.
9
1 pt
Looking at the model above, if the hawks are increased, what will happen to the grass? Please explain your reasoning.
10
1 pt
Describe the role of decomposers in an ecosystem.
11
1 pt
After our lessons on food chains, predator-prey relationships (graphs) and videos in class, name and describe one way you could increase biodiversity in an ecosystem.
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