Carbon Cycle 1. What is a fossil? 2. What is the difference between a renewable and non-renewable resource? 3. Do you think fossil fuels are 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!

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

What’s good?  Catalyst Review  Carbon!  Steps of the carbon cycle  Musical chairs  Independent practice  Exit question  Worksheet  Pack from yesterday  Study Guide  Quiz tomorrow! AGENDA HOMEWORK

Intro Vocabulary  Carbon = an element that is found in all living/dead things  Fossil fuels = energy sources formed from the fossils of dead organisms  Fossil fuels are made of carbon  Examples: oil, coal, natural gas

Key Point #1: Carbon is found in different forms and different sources  Sources of carbon – Plants – Animals – Soil – Fossil fuels – Dead things – Atmosphere

Key Point #2: Carbon moves from source to source in five different processes (steps)

 Photosynthesis  Respiration  Decomposition  Combustion (fossil fuel burning)  Gas exchange Five steps of the carbon cycle

Section 2.2 Summary – pages Carbon Cycle A

A  Process: Cellular respiration  Illustration Description: Arrow points from plants to atmosphere  Definition: plants and animals break down organic carbon to CO 2  Money Analogy: returning money (CO 2 ) to the bank

Respiration CO 2

Section 2.2 Summary – pages Carbon Cycle B

B  Process: Photosynthesis  Illustration Description: Arrow points from atmosphere to plants  Definition: plants convert CO 2 into glucose (sugar)  Money Analogy: taking money out of the bank as dollars

Photosynthesis + CO 2

Section 2.2 Summary – pages Carbon Cycle C

C  Process: Combustion  Illustration Description: from factory to atmosphere  Definition: burning fossil fuels releases CO 2  Money Analogy: returning money (CO 2 ) to the bank

Combustion CO 2 !!!!

Section 2.2 Summary – pages Carbon Cycle D D

D  Process: Gas exchange  Illustration Description: arrows between water and atmosphere  Definition: CO 2 dissolves in and out of water  Money Analogy: money in and out of bank

Gas exchange Water CO 2

Section 2.2 Summary – pages Carbon Cycle E

E  Process: Decomposition  Illustration Description: dead animals to underground  Definition: carbon stored as fossil fuels after things die  Money Analogy: money hidden under the bed

Decomposition C C C C C C C

What step of the carbon cycle???  Involves plants removing CO 2 from the atmosphere?  Involves plants and animals releasing CO 2 into the atmosphere?  Involves a human activity releasing CO 2 into the atmosphere?  Adds and releases CO 2 into the atmosphere at the same time?

Musical Chairs

Take the carbon cycle a step farther…  Answer questions on your classwork  Work together  Think hard  Answer thoughtfully

Independent Practice  Individual work.  Work hard.  Think critically.

Exit Questions Write in complete sentences! Don’t talk during the Exit Question! DESCRIBE what occurs in THREE of the following steps of the carbon cycle: photosynthesis, cellular respiration, decomposition, gas exchange, combustion HOMEWORK: Worksheet # 1 – 8 Back is Extra Credit