A succession of rocks bounded by unconformities:a
period d. bedding plane
b. sequence e. ecosystem
c. system
B
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When a factory pollutes a river, the costs and losses that affect people downstream would be called ________ costs.
A. Social B. Incidental C. External D. Internal E. Indirect
What is an aerial burst?
A) an explosion in the asteroid belt that sends asteroids hurtling toward Earth B) a secondary explosion above an impact crater, occurring after impact C) a meteor bursting into many smaller pieces when bombarded with nuclear weapons D) an explosion of a meteor entering the Earth's atmosphere
Which of the following materials will react with an acid to produce a gas?
A) NaOH(aq) B) Na2CO3(aq) C) both a and b D) neither a nor b
Which part of the three-cell general circulation model is associated with convection near the equator?
a. The trade cell. b. The Ferrel cell. c. The polar cell. d. The Hadley cell.