Once released, how long do chlorofluorocarbons remain in the atmosphere?
A. about 1 month
B. about 100 years
C. about 10 days
D. about 1 year
Answer: B
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In the figure of an ecosystem, choose which of the components are categorized as biotic
What will be an ideal response
The angle of _______________ is the steepest angle at which a slope will remain stable
Fill in the blank with correct word.
The water molecule is a polar molecule which means that ________.
A. it has a slightly negative and a slightly positive side B. it has extremely high viscosity C. it forms a crystal lattice while still a liquid D. it is spherical E. it has low heat capacity
What is meant by demographic transition?
A. Populations decrease as food production is diminished. B. Populations decrease when death rates exceed birth rates. C. Populations stabilize when birth and death rates are equal. D. Populations increase when birth rates exceed death rates.