1.Multiple sources contribute; CO2 is primary but not sole
cause
2.Excess nutrients cause eutrophication and dead zones
3.Carbon cycle disruption: Deforestation has a double impact on atmospheric carbon — it releases stored carbon when trees are burned or decompose, AND it removes the photosynthetic capacity that would otherwise absorb future CO2 from the atmosphere.
[!] STUDY GUIDE: Big Ideas
Use to answer form questions!
1.Carbon moves through Earth's reservoirs in bidirectional
cycles.
Atmosphere, biosphere, hydrosphere, lithosphere exchange carbon
constantly.
2.Photosynthesis removes CO2; respiration/decomposition returns
it.
Balance maintains healthy ecosystems.
3.Most carbon is stored underground, not in visible trees.
Peatlands store 4x more carbon per hectare than tropical
forests.
CARBON CYCLE (connects to W1 acidification + W2 nutrients!)
[#] KEY TERMS
Define in YOUR words
Carbon cycle
Movement of C through Earth systems
Sequestration
Long-term carbon storage
Photosynthesis
CO2 + H2O + light -> glucose + O2
Respiration
Glucose + O2 -> CO2 + H2O + energy
[?] THE PHENOMENON
Write BEFORE Hook form
Where does all the carbon go when forests are cut down?
Every year, 10 million hectares of forest are cleared. A single
large tree stores hundreds of kilograms of carbon. When the forest
is cleared, where does all that carbon GO?
Your initial thinking:
[>] AFTER HOOK FORM
Reflect, then continue+2 pts
I learned that...
TURN & TALK #1
"I predict the carbon goes to because
."
PARTNER'S PREDICTION:
Station 1 — Carbon Reservoirs
Most carbon is stored in...
Photosynthesis moves carbon by...
Key insight:
Station 2 — Sequestration Data
The data shows forests store...
Cutting forests releases carbon because...
Key insight:
TURN & TALK #2
"I was surprised that because I used
to think ."
PARTNER'S SURPRISE:
COLD CALL Be ready to share what
surprised YOUR PARTNER about carbon storage!
[/] DAY 1 EXIT TICKET
Complete before leaving+5 pts
Q1:
Where is most of Earth's carbon stored? (Hint: it's not where you
might think!)
Q2:
How does deforestation releasing CO2 connect to ocean acidification
(W1)?
Confidence:
Carbon Cycle & Sequestration (continued)
Name:
[=]Day 2 start
Station 3 — Human Impacts & Solutions
Fossil fuel burning affects the cycle by...
Solutions to increase sequestration include...
A tradeoff or challenge is...
Key insight:
[+] MAKING CONNECTIONS
Use for Exit Ticket!
W1 ocean acidification: How does deforestation releasing carbon
connect to ocean pH changes?
W2 eutrophication: How do both carbon and nutrient cycles affect
ecosystem health?
[/] DAY 2 EXIT TICKET
Final check before Science Circle+5 pts
Q1 (NEW):
Which process moves carbon FROM atmosphere INTO organisms? Explain
how it works.
Q2 (SPIRAL):
How does the carbon cycle connect to ocean acidification (W1)?
Q3 (INTEGRATION):
Explain how fossil fuel burning AND deforestation both affect the
ocean (two pathways).
CHECKTEST YOUR THINKINGRate each: FALSE ← 1–2–3–4–5 → TRUE
1. Trees are the largest carbon sink on Earth, storing more carbon than any other reservoir.
F12345T
2. When a forest is cut down, the stored carbon is released AND the ability to absorb future CO2 through photosynthesis is lost.
F12345T
3. Carbon only enters the atmosphere when fossil fuels are burned — deforestation does not release carbon.
F12345T
4. Photosynthesis removes CO2 from the atmosphere, while respiration and decomposition return it — these processes must stay balanced.
F12345T
5. Planting new trees can immediately offset all the carbon released by cutting down old-growth forests.
F12345T
Pick any TWO statements — especially any you rated 2, 3, or 4. Justify your rating with evidence:
Statement #___ — I rated it ___ because:
Statement #___ — I rated it ___ because:
[O] SCIENCE CIRCLE
~15 min | End of week+3 pts
[!] My "Aha!" Moment
[?] My Remaining Question
PRE-WRITESilent | 2 min
Complete your "Aha!" and "Remaining Question" boxes above BEFORE
discussing.
TURN & TALK
"My aha moment was because
."
LISTEN & RECORD: What was your
partner's aha?
COLD CALL Be ready to share your
PARTNER's thinking, not your own!