Name, locate, and describe Earth’s three concentric layers. What are these divisions based on and what
volume does each layer take up? What will be an ideal response?
The three concentric layers are determined by density. At Earth’s center is the most dense layer, the
core, with a calculated density of 10-13 grams per cubic centimeter. At 16% of the total volume, the
core is mostly iron with a small amount of nickel. There are two layers, a solid interior and a liquid
outer layer. The mantle makes up most of the planet’s volume, 83%. The mantle is much less dense
than the core, 3.3-5.7 grams per centimeter cubed. It is composed mostly of dark, dense peridotite. The
outermost layer is the least dense layer, the crust. There are two major types, continental crust, which
is thick and has an average density of 2.7 grams per cubic centimeter and oceanic crust, which is
thinner and density at 3.0 grams per cubic centimeter.
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Colonel Muammar al Qadhafi is the leader of
A. Algeria B. Libya C. Morocco D. Tunisia
Which of the following best matches the description?Greenhouse gas released into the atmosphere from cattle and rice paddies
A. Nitrous oxide. B. Methane. C. Kyoto Protocol. D. greenhouse gases. E. IPCC. F. climate change. G. CFCs. H. Greenhouse effect. I. Carbon dioxide. J. Global warming.
The most far-reaching and controversial environmental law ever adopted requiring the identification of endangered and threatened species is ____.
A. CITES B. the Convention of Biological Diversity Treaty C. the Endangered Species Act D. the National Fish and Wildlife Law E. HIPPCO
What must be done prior to making forcible entry into a fire building?
a. utilities must be controlled b. an "all clear" must be declared c. the fire attack team must be ready d. ventilation must be established