Natural Cycles Review Question Preview (ID: 46702)


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Which of the following is not one of the elements most abundant in living things?
a) nitrogen
b) helium
c) carbon
d) hydrogen

A polluntant released into the atmosphere is
a) a nodule
b) acid precipitation
c) an emission
d) photochemical smog

Releasing nitrogen from the soil back into the atmosphere is called
a) nitrogen fixation
b) cellular respiration
c) denitrification
d) photosynthesis

Converting nitrogen in the atmosphere into a form that can be used by plants is called
a) nitrogen fixation
b) cellular respiration
c) denitrification
d) photosynthesis

Which of the following hosts nitrogen-fixing bacteria in nodules on its roots?
a) a decomposer
b) a consumer
c) an emission
d) a legume

The process by which an organism's body releases energy from carbon-based molecules is called
a) nitrogen fixation
b) cellular respiration
c) denitrification
d) photosynthesis

Which process describes how plants make sugar from sunlight, water, and carbon dioxide?
a) nitrogen fixation
b) cellular respiration
c) denitrification
d) photosynthesis

Air pollution can be caused by burning too many
a) emissions
b) fossil fuels
c) nodules
d) legumes

When precipitation gathers into a body of water, it is called
a) runoff
b) collection
c) acid precipitation
d) photochemical smog

The precipitation that flows over the surface of soil is
a) runoff
b) collection
c) smog
d) acid precipitation

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