In addition to carbon dioxide, _______________ and _______________ have risen above their pre-industrial levels in Earth’s atmosphere
Fill in the blank with correct word.
ANSWER: methane, nitrogen oxides
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Mid-ocean ridges are higher than surrounding oceanic crust primarily because:
a) two plates are colliding b) the crust is thicker c) the crust is stronger d) transform faulting uplifts the rocks e) lithosphere is thinner and hotter
This figure shows plate boundaries south of Alaska. Which location is likely to contain volcanoes above a subduction zone?
A. 1 B. 2 C. 3 D. 4 E. 2 and 3
Soil structure is usually determined by clumps called ________
A) colloids B) peds C) loam D) solum E) catenas
Plantations had all of the following characteristics EXCEPT
A) they produced luxury foodstuffs like spices, cocoa and coffee. B) they were often located near coasts to facilitate export to Europe. C) sometimes land was expropriated for plantations from land used for local food crops. D) they were small scale enterprises. E) forced labor was often used on plantations.