Cycles Within Ecosystems
Overview
Carbon is the backbone of every organic molecule in every living organism, yet there is a fixed amount of it on Earth. The carbon cycle describes how this element moves continuously between the atmosphere, living organisms, the oceans, and the ground, recycled over and over again.
In this lesson you will trace carbon through the four key processes that drive the cycle: photosynthesis, respiration, decomposition, and combustion. Understanding the carbon cycle also helps explain why burning fossil fuels is altering the composition of the atmosphere.
Objectives
- Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Cycles Within Ecosystems. 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.
- Which process in the carbon cycle removes CO2 from the atmosphere? A) Respiration B) Combustion C) Photosynthesis D) Decomposition Answer: C
- Decomposers release CO2 into the atmosphere by: A) Photosynthesis B) Combustion C) Respiration D) Condensation Answer: C
- Which of the following is a fossil fuel? A) Wood B) Coal C) Ethanol D) Hydrogen Answer: B
- Deforestation increases atmospheric CO2 because: A) Trees produce CO2 B) Fewer trees means less photosynthesis to absorb CO2 C) Animals move away from the area D) Soil temperature drops Answer: B
- Which organisms are the main decomposers in ecosystems? A) Plants and algae B) Insects and worms C) Bacteria and fungi D) Fish and birds 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
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