Which of the following elements makeup most of the rocks in Earth's crust?
A. Iron and MagnesiumÂ
B. Silicon and Aluminum
C. Iron and Calcium
D. Silicon and Oxygen
E. Carbon and Iron
Answer: D
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Which does not describe a law?
a. A law summarizes observations. b. A law explains observations. c. A law is the largest construct to summarize experimental observations d. A law explains unvarying uniformity under the same conditions.
By 2050, it is estimated that more than 50% of all coral reefs will be lost.
Answer the following statement true (T) or false (F)
A ________ occurs when the fault plane forms a low angle relative to the horizontal, resulting in the overlying block being shifted over the underlying
A) lateral fault B) thrust fault C) normal fault D) strike-slip fault
In terms of area, what are the two largest countries in Sub-Saharan Africa?
a. South Africa and Ethiopia b. the Democratic Republic of Congo and South Africa c. Nigeria and Ethiopia d. the Democratic Republic of Congo and Chad e. Nigeria and Chad