Food Webs and System Change Worksheet
📝 Worksheet medium ⏱️ 20 minutes 8 problems
Food Webs and System Change Worksheet
Grade 7 Science LearnCrux.com
Name:
Date:
Directions
- Fill in each blank carefully.
- Circle or mark the best answer for each multiple-choice question.
- Match each prompt to the best option before writing your answer.
- Use the larger space to show your thinking on word problems.
1. Energy in many ecosystems begins with __.
2. Which model best helps show many feeding relationships?
3. Match the disturbance to a likely effect: invasive plant spreads quickly
Match with:
Answer:
4. Matter can cycle through producers, consumers, and __.
5. Why is a food web usually more realistic than a single food chain?
6. Which evidence would best support a claim about ecosystem change?
7. An ecosystem model can help explain relationships that are hard to observe all at __.
8. Why should students use both models and evidence in ecosystem explanations?
📋 Teacher Answer Key
1. producers
2. food web
3. native plant populations may decline
4. decomposers
5. Most organisms have several feeding relationships, so a web shows ecosystem connections more accurately
6. a population graph over time
7. once
8. Models help show the relationships, and evidence helps support claims about what changed and why