Bellringer Expectations C – voice level 0 H – raise hand and wait for teacher A – entry ticket at desk M – remain in seat unless given teacher permission P – work with your partner Complete the photosynthesis and cellular respiration entry ticket at your desk

Law of Conservation of Mass & Energy & The Carbon Cycle SC.8.L.18.3 Model the carbon cycle to show how matter and energy are continuously transferred within and between organisms and their physical environment. SC.8.L.18.4 Cite evidence that living systems follow the Laws of Conservation of Mass and Energy. Essential Question: How are the many carbon-based compounds cycled through living and nonliving things in an ecosystem? How do living systems obey the Law of Conservation of Mass?

Bell Ringer A diagram of the carbon cycle is shown to the right. Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow X? Bacteria break down molecules in animals into carbon-based soil nutrients.   B. Animals release oxygen that is used by bacteria to produce carbon dioxide.   C. Animals release carbon dioxide that is used by bacteria for growth and reproduction.  D. Bacteria combine carbon-based nutrients from plants and animals to produce glucose.

“Traveling Carbon Atoms” Modeling the Carbon Cycle During this activity, you will be exposed to the different ways that carbon can move within and between organisms and their environment . You will interact with various parts of the environment and investigate how carbon moves through different phases of the carbon cycle, always remaining as a form of carbon just in a different form. There are 4 stations around the room: The Ocean The Atmosphere Fossil Fuels The Forest Each station represents the carbon stores or reservoirs within the cycle. As you travel to the various stations you will record, on your worksheet, the information from the cards at the station for each trip.

“Traveling Carbon Atoms” Each student will receive a number 1-8. This will be your starting station. Number Station 1 Fossil Fuel 2, 3, 4 Ocean 5, 6, 7 Forest 8 Atmosphere

“Traveling Carbon Atoms” Modeling the Carbon Cycle Go to your starting stations Record in your data sheet “how you traveled” and “where you went/going” Once the signal (music will play) is given, everyone will walk to their next station as described on their station card. You will have 1 minute at each station Expectations C – voice level 1 (inside voice) H – raise hand and wait for teacher response A – follow the procedures for the “Traveling carbon atoms” activity M – walk don’t run to your station P – everyone should be taking down the information from each station as they travel around the room

Analysis Questions 10 Min 1. How many stops can you make on your trip? 2. Was everyone's journey the same? Why not? 3. As we went through the game did our number of carbon atoms increase or decrease? What happened to the carbon atoms? 4. Name a process that moved carbon from the atmosphere to organisms. Was there more than one organism that can do this? 5. Name a process that puts carbon into the atmosphere? Was there more than one organism that can do this? 6. Did you make it to all the stations? Would a carbon atom eventually be found in all the reservoirs represented?

“Traveling Carbon Atoms” Name the products and reactants of both photosynthesis and cellular respiration. Water Glucose Oxygen Carbon Dioxide H2O C6H12O6 O2 CO2

“Traveling Carbon Atoms” How can carbon move between the environment and living organisms? Or from one organism to another one? Video

Discuss with your partner the question below Discuss with your partner the question below. Answer the question below in 5 sentences or more in your science notebook. Be sure to use the new vocabulary such as: photosynthesis, glucose, organism, environment, carbon dioxide, carbon, reactants, products, etc How can carbon move between the environment and living organisms? Or from one organism to another one?

Bell Ringer A diagram of the carbon cycle is shown to the right. Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow X? A Bacteria break down molecules in animals into carbon-based soil nutrients.   B. Animals release oxygen that is used by bacteria to produce carbon dioxide.   C. Animals release carbon dioxide that is used by bacteria for growth and reproduction.  D. Bacteria combine carbon-based nutrients from plants and animals to produce glucose.

Law of Conservation of Matter The Law of Conservation of Matter states that matter is not created or destroyed, only rearranged or recycled.

Law of Conservation of Energy The Law of Conservation of Energy states that energy is not created or destroyed, only rearranged or recycled. Energy may change form but the total amount remains the same.

Photosynthesis Carbon Dioxide (CO2) is taken out of the air by plants through photosynthesis. Plants take in carbon dioxide (CO2) and release oxygen (O2). Chlorophyll absorbs sunlight for photosynthesis.

Cellular Respiration Carbon Dioxide Energy Water Glucose Oxygen BOTH plants and animals release carbon dioxide (CO2) into the air through cellular respiration (in mitochondria) For example: Humans and other animals breathe in oxygen and breathe out carbon dioxide (CO2)

Think Pair Share Photosynthesis & Cellular Respiration Interrelatedness How are the two processes related? How do the processes demonstrate the law of conservation of matter / energy?

The Carbon Cycle The Carbon Cycle is a complex series of processes through which all of the carbon atoms in the world recycle. Carbon can be found in carbon reservoirs: Atmosphere Oceans/Water Fossil Fuels & rocks Sediments Organisms *All life on earth is based on carbon

The Carbon Cycle Photosynthesis and Cellular respiration help move carbon through the carbon cycle

The Carbon Cycle: Decomposition Decomposers break down dead organisms. Millions of years old plants, animals, and waste decompose and turn into fossil fuels.

Carbon Cycle: Human Impact Fossil fuels can be burned by planes, automobiles, and power electricity plants releasing carbon back into the atmosphere. Deforestation removes trees that absorb carbon dioxide from the atmosphere. Fewer trees means less carbon dioxide is being absorbed.

Check Your Understanding How do living systems obey the Law of Conservation of Mass?