📚 Topic Summary
Food chains and food webs illustrate the flow of energy through an ecosystem. A food chain is a linear sequence of organisms where each organism serves as food for the next. For example, grass $\rightarrow$ grasshopper $\rightarrow$ frog $\rightarrow$ snake $\rightarrow$ hawk. A food web, however, is a more complex and realistic representation, showing interconnected food chains within an ecosystem. It demonstrates how various organisms rely on multiple food sources and how energy is transferred through these intricate relationships. Understanding these concepts is crucial for grasping ecological balance and the impact of changes within an ecosystem.
🍎 Part A: Vocabulary
Match the terms with their correct definitions:
| Term |
Definition |
| 1. Producer |
A. An organism that consumes other organisms. |
| 2. Consumer |
B. An organism that breaks down dead organic matter. |
| 3. Decomposer |
C. An organism that makes its own food through photosynthesis. |
| 4. Food Chain |
D. A sequence showing the transfer of energy from one organism to another. |
| 5. Food Web |
E. Interconnected food chains showing feeding relationships in an ecosystem. |
Answers: 1-C, 2-A, 3-B, 4-D, 5-E
🌿 Part B: Fill in the Blanks
Complete the following paragraph using the words: energy, ecosystem, consumers, producers, decomposers.
In an ________, ________ like plants create their own food. ________ then eat these plants or other animals. Finally, ________ break down dead organisms, returning nutrients to the soil, and recycling ________ through the system.
Answer: ecosystem, producers, consumers, decomposers, energy
🤔 Part C: Critical Thinking
Explain how the removal of a keystone species, such as a sea otter, from a food web can affect the entire ecosystem.