What is meant by Hubbert's Peak, and how does it apply to the United States and the world?
What will be an ideal response?
Hubbert's Peak refers to the peak oil production point after which oil and gas would be less available; "580 of the 651 largest oil fields have passed their peak production and are declining every year."
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In 1400 A.D., the dry steppes and desert margins that ranged from the western Sahara to Mongolia were populated by
A) pastoral (animal herding) minisystems. B) land speculators. C) newly evangelized Christians. D) European immigrants.
A frothy volcanic rock with so much void space that it can actually float is called
a) Obsidian b) Tephra c) Pumice d) Lava e) Tuff
Suppose you are outside in very cold temperatures, wearing a winter coat that is quite effective at
keeping you warm. Which of the following is true? a. The coat is the source of the heat that keeps you warm. b. Your body generates the heat that keeps you warm. c. The coat prevents your body’s heat from escaping to the surrounding air. d. both (a) and (c) are true. e. both (b) and (c) are true.
Which of the following is a zooplankton?
A) Coccolithophores B) Diatoms C) Dinoflagellates D) Radiolarian E) Virioplankton