What has happened to unemployment rates in central cities since the 1960s?
A) They have risen steadily.
B) They have declined steadily.
C) They declined in the 1960s, then rose consistently since then.
D) They rose steadily in the 1960s, but have declined significantly since that time.
E) They have remained steady.
A
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Substandard educational facilities are usually an important factor in the cycle of neighborhood poverty
Indicate whether this statement is true or false.
Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom?
ABCD
A. A B. B C. C D. D
Compare two air parcels at sea level that have the same size but different temperatures. Which of the following describes the colder parcel of air?
A. The pressure is the same, but the density is lower than the warm parcel. B. The pressure is the lower, but the density is the same as the warm parcel. C. The pressure is higher, but the density is the same as the warm parcel. D. The pressure is the same, but the density is higher than the warm parcel.
As energy moves through trophic levels it increases from lower to higher levels
Indicate whether the statement is true or false