What is the source of heat responsible for the high temperatures in Earth's mantle? What is the source of heat responsible for the high temperatures in Earth's core?
What will be an ideal response?
The crystallization of iron at the inner-core/outer-core boundary releases heat. Radioactive decay of elements within the mantle is responsible for the high temperatures in the core of Earth.
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Life has been sustained on the earth
A. for approximately six billion years. B. since the time of the last impact of the meteorite. C. through millions of years of ice ages and long warming periods. D. since the human species has been around. E. because of renewable resources.
Identify some of the key ethnic minority groups (as defined by language and religion) within Russia and neighboring states
What will be an ideal response?
Hydrocyanic acid, HCN, is a weaker acid than ammonium ion, NH4+. When hydrocyanic acid reacts with ammonia, NH3, what species are present in the solution in the largest amount?
A) hydrocyanic acid, HCN, and ammonia, NH3 B) hydrocyanic acid, HCN, and ammonium ion, NH4+ C) cyanide ion, CN-, and ammonia, NH3 D) cyanide ion, CN-, and ammonium ion, NH4+
In "The Theory of the Leisure Class," Thorstein Veblen used the term "conspicuous consumption" to describe
A. Inefficient use of heating fuel B. Buying things we don't need in order to impress others C. Buying things we don't want in order to keep others from having them D. Producing more food than we need to prove our superiority to other nations E. Choosing to throw away food instead of feeding poor and malnourished people