Why are meteorites a possible source of information regarding the origin and composition of Earth? Also, what other "clues" might be present in meteorites?
What will be an ideal response?
Because all of the solar system formed from a nebula following a supernova explosion, meteorites and comets are remnants of that early nebula that have not been affected by all of the processes that rocks on earth have seen. Thus, we can use them to evaluate elemental abundances and isotopic abundances in the solar nebular, etc. They also provide clues of planetary formation (and destruction) with iron-nickel meteorites showing origins from a planet that had formed but was later destroyed.
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A principal practice of sustainable agriculture is
A) sensitive land management. B) limited use of chemicals. C) better integration of crops and livestock. D) use of pesticide-resistant seed. E) All but the use of pesticide-resistant seed are principal practices.
What is atmospheric stability? What are adiabatic processes and how they are related to atmospheric stability?
What will be an ideal response?
The number of landfills in the United States has decreased from over 7,000 in the year 1989 to less than 2,000 in the year 2014
A. because much of the municipal solid waste is now being incinerated to produce electricity. B. because many small poorly run landfills have closed and current landfills are larger. C. because the amount of municipal solid waste being generated has declined. D. None of these statements is correct.
Low-pressure zones circulate counterclockwise in the northern hemisphere
a. True b. False