1. Carbon Dioxide is produced by: A. Plants B. Animals C. Cyanobacteria D. All of the above

2. What is the crystal structure of Carbon Dioxide? A. Linear B. Trigonal C. Cubic D. None of the above

3. Which type of carbon dioxide do some fire extinguishers, especially those designed for electrical fires, contain? A. Dry B. Liquid C. Solid D. All of these

4. What does carbon dioxide form after dissolving in water? A. Carbonyl Sulphide B. Carbonic Acid C. Carbon Monoxide D. All of these

5. What is the color of carbon dioxide gas? A. Blue B. Yellow C. Colorless D. Green

6. What is the solid form of carbon dioxide? A. Dry Ice B. Cold Bed C. Cold Soak D. Cold Water

7. Carbon cycle mainly moves movement on earth by photosynthesis and: A. Respiration B. Planktosis C. Combustion D. None of the above

8. In enhanced coal bed methane recovery, carbon dioxide is pumped into the coal seam to displace: A. Dry Ash B. Methane C. Water D. Sodium

9. In what manner is the carbon atom bonded to the oxygen atom in carbon dioxide? A. Metallic single bonded B. Metallic double bonded C. Covalently double bonded D. None of the above

10. The respiratory centers try to maintain an arterial CO2 pressure of A. 20 mmHg B. 40 mmHg C. 10 mmHg D. 5 mmHg