Which of the following gases best absorbs ultraviolet light? carbon dioxide hydrogen ozone nitrogen oxygen QUESTION 30 Which of the following is not directly a product of outgassing? en water nitrogen carbon dioxide QUESTION 31 Which of the following planets has the thinnest atmosphere? Mars O Venus O Earth QUESTION 32 Which of the following statements about the greenhouse effect is true? A weak greenhouse effect operates on Mars. One result of an increased greenhouse effect on Earth may be an increased number of severe storms. The burning of fossil fuels increases the greenhouse effect on Earth because of the release of carbon dioxide. Without the naturally occurring greenhouse effect, Earth would be too cold to have liquid oceans. All of the above are true. QUESTION 33 Which of the terrestrial worlds has the strongest magnetic field? Earth Venus the Moon Mars Mercury