If the half-life of a radioactive isotope is known and the parent/daughter ratio can be determined, then the age of the sample can be calculated using radiometric dating techniques.
a. true
b. false
a. true
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Which of the following is true of a population pyramid?
A) It shows a country's population by age and gender B) It shows a country's population by sex and height C) It shows a country's population by education and gender D) It shows a country's population by education and income level E) It shows a country's population by gender and income
The majority of the United States lies within a(n) ____ wind belt
A) westerly B) easterly C) northerly D) southerly
A landfill that was abandoned about 20 years ago has been eroding. Trees and grasses that had grown on the surface have died, the soil is eroding away, and buried wastes are now exposed at the surfaces
Nobody has been doing anything with the landfill for years. Most likely, these problems are the result of A) rodents trying to dig up the buried wastes. B) biogas seeping to the surface. C) settling of the Earth as the buried wastes decompose. D) leachate generation from the buried wastes.
Northeasters (or nor'easters) are midlatitude storms commonly found along
a. ?the Pacific coast of North America. b. ?the Atlantic coast of North America. c. ?the Gulf coast of North America. d. ?both the Pacific and Atlantic coasts of North America. e. ?the Pacific coast of both North and South America.