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College Environmental Science
Carbon dioxide is                                                                    .
  1. the most potent (per molecule of gas) of the greenhouse gases
  2. the most abundant greenhouse gas
  3. more potent (per molcule of gas) than methane
  4. the main anthropogenic greenhouse gas produced in the United States
  5. the only greenhouse gas presently increasing in the atmosphere
Grade 11 Molecules and Compounds
What is the formula for nitrogen dioxide?
  1. [math]NO[/math]
  2. [math]N_2O[/math]
  3. [math]NO_2[/math]
  4. [math]N_2O_2[/math]
Grade 9 Bonds and Mixing
Grade 9 Respiration, Digestion, and Excretion
Carbon dioxide diffuses                                    .
  1. from the alveoli to the capillaries
  2. from the capillaries to the veins
  3. from the venules to the bronchi
  4. from the capillaries to the alveoli
Grade 8 Properties of Matter
Grade 5 Botany
Grade 9 Volcanoes
What kind of gas does Kilauea release?
  1. carbon dioxide
  2. carbon monoxide
  3. oxygen
  4. sulfur dioxide
Grade 10 Outer Planets
Grade 7 Environmental Science
Grade 5 Atmosphere
The atmosphere is made mostly of nitrogen and
  1. oxygen
  2. carbon dioxide
  3. hydrogen
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