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One Strange Rock LT 6 Carbon Cycle Name: ___________________________________ Gasp 1. According to Will Smith, the strangest place in the universe might just be __________________. 2. The “thin blue line” refers to Earth’s __________________. 3. When he had to flush his spacesuit, all of astronaut Chris’ oxygen _______________________. 4. The only life that can grow in the acidic lake with no oxygen is a special kind of ____________________. Without oxygen, life can’t grow any larger than a __________________________. 5. Astronauts watch dust storms blow from Africa to ___________________________. In the rainforest, that dust is the perfect __________________________. 6. As they grow, plants and trees turn carbon dioxide (CO2) into ____________________________. 7. The life in the rainforest uses ___________% of that oxygen (O2). 8. From the space station, the _________________________ is a part of the world that is always cloudy. 9. In the Amazon, water travels up ________________________, through the _____________________, and eventually the sun and wind turn that water into a mighty flying _________________________. 10. As the water flows, it erodes rock that becomes nutrients. Those nutrients end up in the____________, where they are used by ____________________ (the tiny secret to Earth’s oxygen supply). 11. When diatoms __________________________________, they produce oxygen (O2). ____________ of your breath is provided by diatom photosynthesis. 12. In Norway… some diatoms get their nutrients from rainforests, some get nutrients from ____________. 13. When nutrients run out, diatoms ________. Then they fall to _________________________________. Eventually the sea beds are exposed and become a _____________________________. 14. And so the dust that blows from deserts of Africa to Amazon rainforests was once _______________. 15. To get to where the oxygen starts to run out, all you really need to do is _________________. 16. La Rinconada is a town at ______________________ feet elevation, the limit of human tolerance. 17. For the makeup of the atmosphere (& for life itself) ________________________ is crucial. 18. Oxygen makes up _________________% of our atmosphere.