The number of people who are too young or too old to work in a society compared to the number of working age people is the
A) dependency ratio.
B) life expectancy.
C) population pyramid.
D) sex ratio.
E) demographic ratio.
Answer: A
Environmental & Atmospheric Sciences
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Answer the following statement true (T) or false (F)
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A rock that is 90 million years old comes from the ________ Period
A) Cretaceous B) Mesozoic C) Phanerozoic D) Jurassic
Environmental & Atmospheric Sciences
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A) desertification B) planning deficiencies C) poor crop management D) poverty E) storm surges
Environmental & Atmospheric Sciences
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A) sill B) dike C) batholith D) laccolith
Environmental & Atmospheric Sciences