Carbon Cycle/Combustion Summative
  • 1. Which Formula best describes Combustion?
A) Fuel+Oxygen =Catalyst +CO2+Water Vapor
B) Light+Heat+Fuel= Water Vapor+CO2+Catalyst
C) Fuel+Oxygen= Light+Heat+Carbon Dioxide+ Water Vapor
D) Fuel+Oxygen = Light+Heat
E) None of the answers listed
  • 2. Which of the following leads to a major imbalance in the carbon cycle?
A) The combustion of fossil fuels
B) Carbon Sinks
C) Tim Tebow
D) The discovery of fossil fuels
E) Allowing trees to grow to maturity
  • 3. Which of the following statements is NOT true about this picture?
A) It is a reason that the carbon cycle is out of balance.
B) None of the answers listed
C) It shows a way that atmospheric Carbon Dioxide gets absorbed
D) It is carbon sink full of tree
E) It shows a way to store carbon
  • 4. Which answer BEST describes where can you find Carbon?
A) In the water molecules within our oceans.
B) Inside all living things
C) Only in the Earth's Atmosphere
D) Usually just in trees
E) Only stored in fossil fuels
  • 5. Is this Formula for Combustion True or False: Natural Gas (Methane) Combustion CH4 + 2 O2 = 4 CO2 + 2 H20
A) False
B) True
  • 6. How is the carbon cycle similar to the water cycle?
A) Both cycles stop working below freezing
B) Both involve the transfer of materials exclusively between plants and animals
C) Both involve the transfer of materials between animals, plants and the earth
D) That cycle's crazy. Terrible. Knucklehead.
E) Both involve liquid substances falling out out of the atmosphere to the Earth.
  • 7. Challenge Question: Looking at the following formulas for combustion of two different materials, which statement is NOT true? Here are the formulas: Wood Combustion: C6H12O6 + O2 = 6CO2 +6H2O Propane Gas Combustion (Ethane) C3H8 + 5O2 = 3 CO2 + 4 H20
A) Because propane comes from carbon that has been stored for millions of years, it is generally considered to be a fuel that is better at balancing the carbon cycle.
B) Because the trees that wood comes from are a more active part of the carbon cycle, carbon dioxide created from the combustion of wood would be less likely to contribute to long term climate change.
C) Propane Propane Gas Combustion (Ethane) C3H8 + 5O2 = 3 CO2 creates fewer units of CO2 per unit of fuel combusted than paraffin Paraffin: (used in modern candles) C25H52 + 38 O2 = 25 CO2 + 26 H2O
D) Each fuel produces water vapor.
E) Wood produces twice as much CO2 than propane per unit burned.
  • 8. What is a carbon sink?
A) Something that removes carbon from the Earth's crust.
B) Something that adds carbon to the atmosphere.
C) None of the answers listed.
D) Something that adds carbon to the Earth's crust
E) Something that actively removes carbon from the Earth's atmosphere
  • 9. Use the picture and choose the statement that is MOST true:
A) Paraffin has the second greatest amount of Carbon in its formula
B) Propane produces less Carbon Dioxide than Natural Gas/Methane when combusted
C) Coal and oil produce the same amount of water vapor through combustion
D) While coal has the greatest amount of carbon in its formula, wood produces more CO2 through combustion
E) Propane and methane produce the same amount of C02 through combustion.
  • 10. Which of these world events lead to the biggest imbalance in the carbon cycle?
A) The Gulf War
B) The Industrial Revolution
C) The Civil War
D) The American Revolution
E) Super Bowl XLVI
  • 11. How does carbon become locked inside the Earth?
A) None of the answers listed.
B) All rocks absorb C02 over time
C) Humans pump large amounts of C02 into large underground storage tanks called carbon sinks
D) Tree roots put carbon dioxide back into the soil
E) The carbon rich bodies of animals and plants put carbon back into the Earth after they die and become buried.
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