Contact metamorphism along sills and dikes may produce metamorphosed zones many kilometers wide
Indicate whether the statement is true or false
False
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Food webs like the one shown below generally show
A) consumers only at the secondary level and above.
B) the degree of interdependence between organisms in ecosystems.
C) all of the structures in an ecosystem.
D) less information than a food chain.
Despite its great size, the United States has no dialects
Indicate whether this statement is true or false.
Which of the following is not something that erupts from composite volcanoes?
A. toxic gas B. pyroclastics C. fast-moving mudflows called lahars D. thin, silica-rich lava you could probably outrun
The future use of electricity to power personal transportation largely depends on
A) more-efficient turbogenerators. B) finding more fossil fuel supplies. C) low-cost, lightweight batteries that can store large amounts of power. D) the development of small turbogenerators for automobiles.