Carbon Changing Costumes Review Day Mar 29 & 30 Please get ready: Your journal Carbon Map Homework Please obtain: Green Packet File Folder

Chemical Formula Quiz Please set up your file folder. When finished with your quiz…draw a diagram on the back that shows any one of the processes that we have completed so far. Ocean Acidification Percolation/Soil Leaching Dissolving/Exsolving of Carbon Dioxide Chemical Weathering Making Limestone Limestone Metamorphism (going from ground to atmosphere)

Homework: Stations 1-3 Review Exchange your paper with a partner. Get a skinny, color marker to use while you are grading the assignment. Total of 17 points.

Station 4 Summary: Limestone Metamorphism What happens when the heat of the Earth’s core heats up limestone? In this activity you heated up sodium bicarbonate that represented limestone. You weighed the mass before and after heating. You should have noticed a decrease in mass after heating. Where did the mass go? Think LoCoM! There was an exsolution of CO₂ gas out of the tube during heating…losing mass. You also tested the pH before and after. You should have observed a change…the product after heating was more basic. That means you changed the product…it was no longer the same thing you started with. In deep Earth, limestone heats up and changes to calcium oxide (s) and CO₂ (g). The gas gets expelled through volcanos or geysers, the solid gets incorporated with other minerals.

Station 4: Limestone Metamorphism Why was there a difference in mass? Carbon dioxide left the tube as a gas. What is the chemical formula for Carbon at the start? NaHCO₃ (s) and CaCO₃ (s) What Carbon is this supposed to represent in the real world? Limestone What is the chemical formula for Carbon at the end? CO₂ What Carbon is this supposed to represent in the real world? Gas in the atmosphere from volcanos or geyers. Where could this simulation happen in the real world? Deep in Earth’s crust Write the balanced chemical equation for this station below: 2NaHCO₃ (s) + Heat Na₂CO₃ + H₂O + CO₂ Compared with processes in nature, this experiment represents movement of Carbon from inside the Earth to the atmosphere.

Let’s add this process to your map…

Station 5: Making Limestone Summary How does carbon sink from surface waters to deeper waters of the ocean? You made 2 solutions: Sodium Bicarbonate and Calcium Chloride When you mixed the two solutions the pH changed to become more acidic, bubbles (CO₂ gas) were produced and there was a white precipitate (solid). That solid was calcium carbonate (limestone)! In the real world this reaction occurs in the ocean with the many free floating ions, they react and the precipitate (limestone) will then settle at the bottom creating a limestone floor.

Station 5: Making Limestone What is the chemical formula for Carbon at the start? NaHCO₃ (aq) What Carbon is this supposed to represent in the real world? Ocean Water What is the chemical formula for Carbon at the end? CaCO₃ (s) + CO₂ (g) What Carbon is this supposed to represent in the real world? Limestone and CO₂ gas What made Carbon change forms? Where could this simulation happen in the real world? Oceans and Ocean floor Write the balanced chemical equation for this station below: Ca²⁺ + 2Cl⁻ + 2HCO₃⁻ + 2Na⁺ 2Na⁺ + 2Cl⁻ + CaCO₃ + H₂O + CO₂ Compared with processes in nature, this experiment represents movement of Carbon from ocean water to seafloor.

Let’s add this process to your map…

Khan Academy Carbon Cycle Glue the questions into your notes section. Answer the questions as you watch the video. https://www.youtube.com/watch?v=_dYkByQ9Kmg

Station #7 For this station you will need the text book. Go to page 559, with your team work through all the questions on pages 559-560 in your journal. When done, draw all 3 processes on your carbon map.