Carbon Cycle/Combustion Summative
  • 1. Which Formula best describes Combustion?
A) Light+Heat+Fuel= Water Vapor+CO2+Catalyst
B) Fuel+Oxygen = Light+Heat
C) None of the answers listed
D) Fuel+Oxygen =Catalyst +CO2+Water Vapor
E) Fuel+Oxygen= Light+Heat+Carbon Dioxide+ Water Vapor
  • 2. Which of the following leads to a major imbalance in the carbon cycle?
A) The combustion of fossil fuels
B) Tim Tebow
C) The discovery of fossil fuels
D) Allowing trees to grow to maturity
E) Carbon Sinks
  • 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 is a carbon sink
D) It shows a way to store carbon
E) It shows atmospheric Carbon Dioxide
  • 4. Which answer BEST describes where can you find Carbon?
A) Usually just in trees
B) Only stored in fossil fuels
C) In the water molecules within our oceans.
D) Only in the Earth's Atmosphere
E) Inside all living things
  • 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 involve liquid substances falling out out of the atmosphere to the Earth.
B) Both cycles stop working below freezing
C) Both involve the transfer of materials exclusively between plants and animals
D) Both involve the transfer of materials between animals, plants and the earth
E) That cycle's crazy. Terrible. Knucklehead.
  • 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) 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
C) 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.
D) Wood produces twice as much CO2 than propane per unit burned.
E) Each fuel produces water vapor.
  • 8. What is a carbon sink?
A) Something that removes carbon from the Earth's atmosphere
B) Something that adds carbon to the Earth's crust
C) Something that removes carbon from the Earth's crust.
D) Something that adds carbon to the atmosphere.
E) None of the answers listed.
  • 9. Use the picture and choose the statement that is MOST true:
A) While coal has the greatest amount of carbon in its formula, wood produces more CO2 through combustion
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) Paraffin has the second greatest amount of Carbon in its formula
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) Super Bowl XLVI
B) The Gulf War
C) The American Revolution
D) The Industrial Revolution
E) The Civil War
  • 11. How does carbon become locked inside the Earth?
A) None of the answers listed.
B) The carbon rich bodies of animals and plants put carbon back into the Earth after they die and become buried.
C) Tree roots put carbon dioxide back into the soil
D) All rocks absorb C02 over time
E) Humans pump large amounts of C02 into large underground storage tanks called carbon sinks
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