World population growth over the past 500 years has most resembled which letter?
A) The letter M
B) The letter U
C) The letter S
D) The letter J
D
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A 1-kg block of iron has a weight of about
A. 10 N. B. 1 N. C. 5 N. D. more than 10 N.
What adverse effect is common to nitrogen dioxide and sulfur dioxide?
A) production of acid rain B) lung irritation C) damage to substances such as rubber, paint, and textiles D) direct damage to plant tissues
The energy "lost" by a system is ____.
A. converted into an equal amount of matter B. equal to the energy the system creates C. converted to lower quality energy D. returned to the system eventually E. converted to higher quality energy
Which of the following is not a specialized feature of arid environments?
A) Mechanical weathering dominates B) Soil creep determines slope development C) Thin regolith D) Prevalence of impermeable surfaces E) Relatively intense precipitation