13.1.1 - Food Chains and Webs
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
What are autotrophs?
💡 Hint: Think about plants and how they create energy.
What is a trophic level?
💡 Hint: Consider the different stages in a chain.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the first trophic level in a food chain?
💡 Hint: Remember, they are the ones that make their own food.
True or False: Energy in a food chain can be recycled back to the producers.
💡 Hint: Think about how energy moves from one level to another without going back.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Given a food chain: Phytoplankton → Zooplankton → Small Fish → Large Fish, calculate the energy available at each level if the producer captures 1000 Joules of sunlight.
💡 Hint: Apply the 10% rule for energy transfer.
Explain how reducing pesticide usage could benefit ecosystems, particularly regarding biological magnification.
💡 Hint: Think about the connection between human health and the food chain.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.