15. Most of the precipitation that falls to the Earth's surface a) falls into the oceans b) remains in ponds and lakes c) seeps into underground d) evaporates into atmosphere
89. Carbon dioxide is being released into the atmosphere in increasing amounts which is causing __ a) temp. of land to rise b) temp. of ocean to rise c) global warming d) all of the above
90. d) all of the above - temp. of land to rise - temp. of ocean to rise - global warming
93. Carbon stored in the bodies of dead plants and animals is released into the atmosphere by burning __ a) coal b) oil c) natural gas d) all of the above
94. d) all of the above - coal - oil - natural gas
95. ___ is the process by which carbon cycles from the environment into living things.
103. When nitrogen is added to the air it can … A. cause the ozone layer to become thin. B. create acid rain. C. cause smog to develop. D. contribute to global warming. E. all of the above.
104. E. all of the above. - cause the ozone layer to become thin. - create acid rain. - cause smog to develop. - contribute to global warming.
105. Humans affect the Nitrogen Cycle in which of the following ways? A. Discharging sewage B. Mining C. Adding fertilizers to the soil D. All of the above
106. D. All of the above - Discharging sewage - Mining - Adding fertilizers to the soil
107. Bacteria are essential to ____ a) combustion b) photosynthesis c) nitrogen fixation d) evaporation
141. Explain how living things would be affected if the water on our planet suddenly stopped evaporating.
142. The Earth would soon be covered with water. The water cycle would be interrupted. It would no longer rain. Land organisms would probably go extinct.