Earlier than 200 million years ago, the continents were joined into one supercontinent called ____
A) Pangaea
B) Panthalassa
C) Oceanus
D) Tethys
A
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How is dumping radioactive waste in the oceans a tragedy of the commons?
What will be an ideal response?
Teratogens are often times also ________
A) neurotoxins B) asphyxiants C) allergens D) carcinogens E) endocrine disrupters
The political scientist Samuel Huntington says that future conflicts will involve tension between civilizations. He would recognize which of the following as a civilization?
A) A country, or nation-state, like the United States, which has definite borders. B) A group of nations defined by ethnic group. C) A group of nations that has similar core values. D) A group of nations defined by continent.
Which type of plate margin is characterized by volcanos that include basalt, andesite, dacite and rhyolite?
A) hot spots B) transform faults C) spreading ridges D) convergent plate margins