Farmers suffering severe poverty often barely produce enough crops to survive, so these farmers
A) exist in a downward spiral of degraded land and reduced productivity.
B) often accumulate neighboring land, grow their farms, and rise out of poverty.
C) work longer days and increase their family sizes until their farms become very profitable.
D) typically convert their farms to forests and sell lumber at much higher prices.
A
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Crater Lake in Oregon is an example of a lake depression caused by
a. displacement of the Earth's crust b. glaciation c. intentional digging by man to create a reservoir d. volcanic activity e. a meteor strike millions of years ago
The theory of "Social Darwinism" was created by
A) Charles Darwin. B) David Hume. C) Herbert Spencer. D) John Locke.
The residence time of an ion in the oceans may be determined by ________.
A. multiplying the input rate by the output rate B. multiplying the ionic concentration by the total amount of the ion C. multiplying the total amount of the ion by either the input or output rate D. dividing the total amount of the ion by either the input or output rate E. dividing the ionic concentration by the input or output rate
Which number on this figure indicates heating by conduction?
A. 1, direct contact between the burner and the pan B. 2, heating by thermal radiation through the air C. 3, heated water expands and rises to the top of the pan and then cools and flows back down D. 4, moving a pan of water away from the stove