Worksheet: Energy Flow in Ecosystems - Food Chains and Food Webs
Comprehension worksheet generated from the video "Energy Flow in Ecosystems - Food Chains and Food Webs".
Worksheet: Energy Flow in Ecosystems - Food Chains and Food Webs
JaxDoc
Energy Flow in EcosystemsMiacademy & MiaPrep Learning Channelhttps://www.youtube.com/watch?v=Gj2p2J7EV9k
Vocabulary
- Trophic cascade — a food web collapse caused by the removal of a keystone species.
- Producers (autotrophs) — organisms that make organic carbon compounds from inorganic sources, forming the foundation of every food chain.
- Consumers (heterotrophs) — organisms that eat organic carbon compounds that were once part of another living thing.
- Food chain — a series of steps that show the energy transfer as one organism is eaten by another organism.
- Keystone species — species that have a large effect on the ecosystem’s stability, despite their relatively low abundance.
Questions
Watch the video and answer the following questions based on the information presented.
1.
According to the video (1:38), what are food molecules, and what are the two main processes by which producers create them from inorganic carbon sources?
2.
The video (5:55) explains the difference between a food chain and a food web. Describe this difference using an example from the video’s illustration (6:04).
3.
Based on the “Energy Pyramid” diagram (8:29), explain why it is rare to find quaternary consumers in an ecosystem.
4.
Which of the following organisms would be classified as an omnivore based on the video’s definitions (3:40)?
5.
The video discusses the overhunting of sea otters in the 1800s and its impact on kelp forests (1:03:40). Describe how the removal of sea otters, a keystone species, led to a trophic cascade in this ecosystem, referencing specific organisms and their roles as shown in the food web (1:05:00).
