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Carbon Cycle
1. What is the difference between a renewable and non-renewable resource?
2. Describe how fossil fuels are formed over time
3. Are fossil fuels renewable or non-renewable? Explain your reasoning.
4. What is one disadvantage of using fossil fuels as our primary source of energy?Write in complete sentences!
Don’t talk during the Catalyst!
4.3 Objectives
By the end of today, all SWBAT…
Identify the forms and sources of carbon
Describe the 6 steps of the carbon cycle, and how humans affect it
4.3 Agenda
Money analogy Carbon forms and sources Steps of the carbon cycle GP Musical chairs How humans impact the carbon cycle Classwork Exit question
Money and CarbonIs money found in only one form?
Where are all the possible places that a $1 bill could go in a period of 10 years?
Do you really ever destroy money?
When do you make money?
Money = _____________________________________
Bank = _______________________________________
Money and CarbonIs money found in only one form?
Where are all the possible places that a $1 bill could go in a period of 10 years?
Do you really ever destroy money?
When do you make money?
Money = _____________________________________
Bank = _______________________________________
Key Point #1: Carbon is found in different forms and different sourcesA. Forms of
carbon– CO2
– Organic
B. Sources of carbon– Plants– Animals– Soil– Atmosphere– Fossil fuels– Dead things
Key Point #2: Carbon moves from source to source in five different processes (steps)
PhotosynthesisRespirationDecompositionCombustion (fossil fuel burning)
Gas exchange
Five steps of the carbon cycle
CO2 in atmosphere: money in the bank CO2 out of atmosphere: take money out
CO2 in atmosphere: money in bank
Carbon Cycle
A
AProcess: Cellular respirationIllustration Description: Arrow points from plants to atmosphere
Definition: plants and animals break down organic carbon to CO2
Money Analogy: returning money (CO2) to the bank
Respiration
CO2
CO2
CO2
CO2
Carbon Cycle
B
BProcess: PhotosynthesisIllustration Description: Arrow points from atmosphere to plants
Definition: plants convert CO2 into glucose (sugar)
Money Analogy: taking money out of the bank as dollars
Photosynthesis
+ CO2
Carbon Cycle
C
CProcess: CombustionIllustration Description: from factory to atmosphere
Definition: burning fossil fuels releases CO2
Money Analogy: returning money (CO2) to the bank
Combustion
CO2!!!!
Carbon Cycle
D D
DProcess: Gas exchangeIllustration Description: arrows between water and atmosphere
Definition: CO2 dissolves in and out of water
Money Analogy: money in and out of bank
Gas exchange
Water
CO2
Carbon Cycle
E
EProcess: DecompositionIllustration Description: dead animals to underground
Definition: carbon stored as fossil fuels after things die
Money Analogy: money hidden under the bed
Decomposition
CC
C
C
CC
C
What step of the carbon cycle???
Involves plants removing CO2 from the atmosphere?
Involves plants and animals releasing CO2 into the atmosphere?
Involves a human activity releasing CO2 into the atmosphere?
Adds and releases CO2 into the atmosphere at the same time?
Musical Chairs
Take the carbon cycle a step farther…
Answer questions 16-20 on your classwork Work together Think hard Answer thoughtfully
Key Point #3: Humans are dramatically increasing CO2 levels in two ways
Pre-reading Questions
1. Answer pre-reading questions BEFORE reading
2. Read paragraph and circle key words Underline key facts
3. Answer post-reading questions
Start the Homework
Exit Questions
Write in complete sentences!
Don’t talk during the Exit Question!
