172. The Carbon And Oxygen Cycles Question Preview (ID: 51063)


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Carbon and Oxygen are elements and are_____________to life
a) helpful
b) essential
c) hurtful
d)

Oxygen lives in the atmosphere as a __________.
a) cloud
b) gas
c) liquid
d) solid

Carbon and Oxygen are constantly being recirculated between air, water, and _______________.
a) animals
b) plants
c) liquids
d) soil

Atmospheric oxygen comes mostly from _____________.
a) soil
b) green plants
c) oceans
d) air

During the process, ___________________, plants use carbon dioxide from the air and turn it into oxygen.
a) cellular respiration
b) fixing
c) photosynthesis
d) mitosis

Carbon dioxide is produced through the ________________of animals.
a) bonding
b) reproduction
c) respirations
d) cloning

The process of living things decomposition releases ___________back into the air, or atmosphere.
a) oxygen
b) nitrogen
c) liquids
d) carbon dioxide

Humans are disrupting the processes of nature. We are releasing too much carbon into the _____________.
a) oceans
b) atmosphere
c) soil
d)

Plants and animals work ______________to balance the oxygen and carbon cycles.
a) independently
b) in tandem
c) with the soil
d)

We, humans, are stressing the processes of nature, and therefore our future, when we cut down too many trees to build cities or housing.
a) True
b) False
c)
d)

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