Feeding Relationships
Overview
Every organism depends on others for food, and those relationships link together into chains and webs that span entire ecosystems. Energy enters the living world through producers and flows upward through consumers, shrinking at every step.
In this lesson you will learn the names ecologists give to each trophic level, how to read and draw food chains, food webs, and pyramids, and the key reason why energy transfer between levels is so inefficient.
Objectives
- Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers, and decomposers
- Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer
- Understand the transfer of substances and energy along a food chain
- Understand why only about 10% of energy is transferred from one trophic level to the next
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Feeding Relationships. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- In a food chain, the arrow points: A) From the predator to the prey B) In the direction of energy flow C) From higher to lower trophic levels D) Toward the producer Answer: B
- Which trophic level always forms the base of a food chain? A) Primary consumer B) Decomposer C) Producer D) Secondary consumer Answer: C
- Which type of pyramid can be inverted? A) Pyramid of energy B) Pyramid of biomass C) Pyramid of numbers D) All three Answer: C
- Approximately what percentage of energy is transferred from one trophic level to the next? A) 1% B) 10% C) 50% D) 90% Answer: B
- Most energy is lost between trophic levels through: A) Photosynthesis B) Excretion only C) Respiration D) Growth Answer: C
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Practice Mock Questions
Want to practice mock questions on Feeding Relationships? Download the Green Bridge CBT app to access mock questions and full practice assessments for this topic.
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