Carbon Cycle & Fires

Overview

In this 60-minute lesson, 8th grade students will deepen their understanding of the carbon cycle by exploring the role of zombie fires—peat fires that smolder underground, particularly in Arctic regions—and their impact on carbon emissions and climate change. This builds on prior knowledge from Lesson 1 about what zombie fires are. Students will engage in hands-on modeling, data analysis, and group discussions to connect these fires to broader ecosystem feedback loops.

This lesson aligns with the Next Generation Science Standards (NGSS) focusing on Earth’s systems and human impact.

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Learning Objectives

By the end of this lesson, students will be able to:

• MS-ESS2-4: Develop a model to describe the cycling of carbon among the hydrosphere, atmosphere, geosphere, and biosphere, incorporating the contribution of peat combustion from zombie fires.
• MS-ESS3-5: Analyze and interpret data on how human activities and natural phenomena (like zombie fires) affect carbon cycles and climate change.
• MS-ESS3-4: Construct an argument supported by evidence about how increases in carbon emissions lead to climate impacts in Arctic and global ecosystems.

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Standards Alignment

NGSS Performance Expectations	Description
MS-ESS2-4	Models to describe cycling of carbon in Earth systems
MS-ESS3-4	Argumentation on human environmental impacts
MS-ESS3-5	Analyze data on climate change and carbon sources

Crosscutting Concepts:

• Systems and System Models (Students use models to describe and predict carbon cycling)
• Cause and Effect (Exploring causes and effects of zombie fires on carbon output)
• Stability and Change (How combustion alters carbon in ecosystems and impacts climate stability)

Science Practices:

• Developing and Using Models
• Analyzing and Interpreting Data
• Engaging in Argument from Evidence

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Materials Needed

• Whiteboard and markers
• Large printed carbon cycle diagram (blank and labeled versions)
• Colored markers or sticky notes (red for carbon release, green for carbon uptake)
• Student handouts with data on zombie fire emissions (simplified graphs/tables)
• Modeling clay or playdough (for "carbon reservoirs")
• Timer or stopwatch
• Small group discussion cards with guiding questions

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Lesson Breakdown

1. Opening (10 minutes)

Activity: Quick Recap & Brainstorm

• Teacher briefly reviews Lesson 1: What are zombie fires? Where do they happen? Why are they important?
• Use a K-W-L style whiteboard chart: What we Know, What we Want to know, and what we will Learn today.
• Pose the question: How do zombie fires fit into the carbon cycle?

Purpose: Activate prior knowledge and focus attention on today’s objective.

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2. Exploring Carbon Cycle and Zombie Fires (20 minutes)

Activity A — Group Modeling (10 min):

• Divide students into 4 groups of 5.
• Provide each group with large blank carbon cycle diagrams and colored markers/sticky notes.
• Students place components of the carbon cycle (atmosphere, plants, soil, peat, oceans) and use red sticky notes to show carbon release and green notes to show carbon uptake.
• Next, groups add the element of zombie fires to the diagram, specifically marking where combustion releases carbon and how peat fires may smolder underground longer than typical fires.

Activity B — Data Analysis (10 min):

• Provide handouts with simple graphs: carbon emissions from normal wildfires vs. zombie fires, and peat land carbon storage data.
• Students analyze and answer guided questions in groups, such as:
  • Which fire type releases more carbon over time?
  • How do zombie fires affect Arctic carbon stores differently?
  • What might this mean for Arctic ecosystems and the global climate?

Purpose: Hands-on modeling builds visual understanding; data analysis sharpens interpretation skills.

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3. Connecting Concepts Discussion (15 minutes)

• Facilitate a whole-class discussion guided by prepared question cards:

  1. Why are peatlands important carbon reservoirs?
  2. How do zombie fires change the balance of carbon in these systems?
  3. What feedback loops might arise if more zombie fires occur due to warming?
  4. How does this local Arctic phenomenon affect global climate change?

• Encourage students to cite evidence from the earlier data and modeling steps.

• Teacher may draw key points on the whiteboard to visually map the cause-effect relationships described by students.

Purpose: Students practice scientific argumentation and deepen conceptual understanding.

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4. Synthesis and Reflection (10 minutes)

Activity: Quickwrite & Share

• Students individually write a short paragraph responding to:
  "Explain how zombie fires affect the carbon cycle and why scientists are concerned about them in the Arctic."
• Volunteers share their responses; teacher highlights strong connections to carbon cycling and climate impact.

Closure: Reinforce that understanding natural processes like zombie fires helps society make informed decisions about climate mitigation and protection of ecosystems.

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5. Assessment and Exit Ticket (5 minutes)

• Distribute an exit ticket asking:

  1. Define “zombie fires” and explain their effect on the carbon cycle.
  2. Why are Arctic peatlands important for climate regulation?
  3. How could increased zombie fires feedback into climate change?

• Collect these to assess individual understanding and plan for any needed reteaching.

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Extensions and Differentiation

• Advanced Learners: Challenge to design an infographic or short presentation explaining zombie fires’ impact using real climate data.
• Supporting Learners: Use sentence starters or graphic organizers for writing and discussion; offer peer support during modeling.
• Homework Extension: Research local carbon reservoirs in their region and write a short reflection on how local human activity could impact them, relating to what was learned.

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Teacher Notes

• Encourage students to see the carbon cycle as dynamic and interconnected with human and natural events.
• Emphasize scientific thinking skills: use evidence, build models, analyze cause-effect.
• Make connections to current news about Arctic fires and climate change to increase engagement.
• Use the modeling clay to physically show carbon mass shifts if time permits.

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This lesson brings the complex carbon cycle to life, making the invisible flow of carbon tangible through interactive models and real-world phenomena, all while grounding instruction firmly in NGSS standards. Teachers who employ this approach will inspire curiosity about Earth's systems and empower students to think critically about climate change drivers.