Biosphere Blueprint Slides
Biosphere Dynamics
Investigations 14, 15, & 16
Today's Mission
1
Matter vs. Energy: Explain why matter cycles while energy flows.
2
Trace the Cycles: Map Water, Carbon, and Nitrogen.
3
Energy Pyramids: Analyze trophic levels and the 10% rule.
Warm-Up Challenge
"Is an atom of carbon in your body today the same atom that might have once been inside a dinosaur? Why or why not?"
Discuss with your elbow partner • 2 Minutes
The Two Drivers
Matter
CYCLES
Reused and recycled between living things and the environment. Total amount stays the same.
Energy
FLOWS
A one-way street. Enters as sunlight, moves through food webs, and exits as heat.
Matter Cycles
Water Cycle
Evaporation: Liquid to gas (oceans).
Transpiration: Water vapor from plants.
Condensation: Vapor to clouds.
Precipitation: Rain, snow, sleet.
Carbon Flows
Photosynthesis: Pulls CO₂ out.
Respiration: Puts CO₂ back.
Combustion: Rapid CO₂ release.
The Global Balance
Carbon Cycle
Carbon is the "building block" of life. It moves between the atmosphere, oceans, soil, and living tissues.
Matter Cycles
Nitrogen Cycle
78% of air is Nitrogen ($N_2$), but most life can't use it in gas form. We need bacteria to fix it!
Fixation: Bacteria turn $N_2$ into usable forms.
Assimilation: Plants absorb nitrogen through roots.
Denitrification: Bacteria release $N_2$ back to air.
$N_2$
Critical for:
Investigation 15
Energy Flow
The 10% Rule
Only 10% of energy is passed to the next level.
90% is lost as heat.
Trophic Levels
1. Producers (Base)
2. Primary Consumers
3. Secondary Consumers
4. Tertiary Consumers (Top)
Energy Pyramid
Tertiary
Secondary
Primary
PRODUCERS
Decreasing Energy
Energy enters at the bottom and escapes at the top.
Investigation 16
Cycle Disruptions
Ocean Acidification
Excess CO₂ breaks the carbonate shell cycle.
Deforestation
Stops transpiration and photosynthesis cycles.
Eutrophication
Excess Nitrogen from fertilizer causes algal blooms and oxygen "dead zones."
Fix the Planet!
The 60-Second Pitch
Work with your group to pick one disruption. Propose a realistic solution.
- Identify the cycle
- Explain the break
- Pitch the fix
10:00
Exit Ticket
- 1 What organism is essential for the Nitrogen cycle to function?
- 2 Why is energy lost (not cycled) in an ecosystem?
- 3 Name one fix for cycle disruptions.
Eco Stability Worksheet Trimmed
Eco Stability Note
Investigation 14, 15, & 16: Matter & Energy
Name:
Date:
Investigation 14: Core Concepts
Matter
How does matter move through the biosphere?
Key Concept: C _ _ _ _ S
Energy
How does energy move through the biosphere?
Key Concept: F _ _ _ S
Investigation 15: The Loops
Water Cycle
Transpiration:
Condensation:
Carbon Cycle
Photosynthesis:
Respiration:
Nitrogen Cycle
Fixation:
Bacteria's Role:
Investigation 15.5: Energy Flow
Label Trophic Levels & Use the 10% Rule
The Calculation:
If Producers have 25,000 kJ of energy, how much energy reaches the Secondary Consumers?
Where does the "lost" 90% of energy go?
Investigation 16: Human Impact
| Disruption | Affected Cycle | Realistic Fix |
|---|
| Ocean Acidification | | |
| Eutrophication | | |
Exit Ticket
1. What organism is essential for the Nitrogen cycle to function?
2. Why is a food chain limited in length (number of levels)?
Planet Patch Handout
Planet Patch
Quick-Reference Cheat Sheet
Big 6 Vocab
Biogeochemical Cycle
Movement of matter through biotic and abiotic spheres.
Nitrogen Fixation
Bacteria converting $N_2$ gas into usable forms for plants.
Transpiration
Plants releasing water vapor into the atmosphere.
Trophic Level
The feeding position in a food web.
Resilience
Ecosystem's ability to bounce back after disturbance.
10% Rule
90% of energy is lost as heat between levels.
Energy Flow Pyramid
Producers
Matter Cycles
Water
- • Transpiration: Plants releasing vapor.
- • Condensation: Clouds forming.
- • Precipitation: Rain or snow.
Carbon
- • Photosynthesis: Pulls CO₂ out.
- • Respiration: Release of CO₂.
- • Combustion: Burning fuels releasing CO₂.
Nitrogen
- • Fixation: Bacteria making $N_2$ usable.
- • Assimilation: Roots absorbing Nitrogen.
- • Eutrophication: Excess runoff causing blooms.
Global Disruptions
Ocean Acidification
Excess CO₂ in the atmosphere absorbs into the ocean, breaking the carbonate cycle for coral and shellfish.
Fix: Transition to Renewables
Dead Zones
Excess Nitrogen from fertilizer runs into water, causing algae blooms that suffocate life.
Fix: Buffer Strips / Precision Farming
The Core Difference
"Matter is recycled. Energy is used up."
Biosphere Dynamics • Investigations 14-16
Investigation Guide Teacher Notes
Investigation Guide
Teacher Instruction & Facilitation Notes
100 Minutes • Grades 9-10
Lesson Pacing & Delivery
0-15m
Matter vs Energy
Core Drivers of the Biosphere.
15-40m
Cycle Trio
Biogeochemical (Water, Carbon, Nitrogen).
40-60m
Pyramids
The 10% Energy Rule & Trophic Levels.
60-85m
Human Impact
Disruption Case Studies (Acidification, Eutrophication).
85-100m
Final Check
Exit Ticket.
Differentiation Guide (Cycle Focus)
| Learner Group | Specific Strategies |
|---|
| Tier 1: High Support | • Provide icons for the Carbon/Water cycles on the worksheet. |
| • Focus on the physical changes of water (liquid vs. vapor). | |
| Tier 2: Targeted Support | • Use the "Planet Patch Handout" as a visual anchor during the pitch prep. |
| • Provide sentence stems for the Ocean Acidification fix. | |
| Tier 3: Extension | • Challenge students to connect the Carbon cycle to global temperature feedback loops. |
| • Discuss the role of Nitrogen and Phosphorus cycles in limiting producers. | |
Key Prompts
"If we removed all nitrogen-fixing bacteria from the soil, how would that affect a wolf population?"
"Why can't we just 'breathe in' the nitrogen in the air if we need it for DNA?"
Misconception Check
- Bacteria as 'Bad': Students often associate bacteria with disease. Emphasize that bacteria are the heroes of the nitrogen cycle.
- Matter vs Energy: Students think energy cycles like matter. Remind them energy is a one-way trip, while matter is a loop.
