Which is a characteristic of shifting cultivation?
A) Land is cleared by tractors or large work crews.
B) Debris is mulched to provide the soil with nutrients.
C) A new site is designated every 50 years.
D) Swiddens not under cultivation are used for mining operations.
E) A new site is designated every few years.
Answer: E
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Which factor primarily explains the difference in temperature patterns between Fairbanks and St. Louis?
Six charts showing the average monthly temperature (in °C and °F) for seven U.S. cities are provided (the first letter of each month of the year is shown along the bottom of the charts). For each of the cities, the latitude and longitude, as well as the elevation, are provided.
Answer the question by comparing the temperature charts. In your answers, consider the one temperature control factor that is most responsible for the patterns shown (choose from latitude, land–water contrasts, wind patterns, or altitude). You may use the same answer for more than one question. You should locate each of the cities on a world map before trying to answer the question. If altitude is the main factor cited, calculate the expected temperature difference between the two cities based on the average lapse rate.
Radiation, as an energy transfer mechanism, is especially important because
A) radiation energy can travel without an intervening medium. B) everything radiates. C) radiation provides us with visible light. D) all of the above
Rapid cooling of magma results in a(n) ____________________-grained texture called
____________________. Fill in the blank(s) with the appropriate word(s).
What concept describes the maximum number of people who can live in reasonable comfort and freedom indefinitely?
A. optimization strategy B. genetic optimization C. stabilization theorem D. nil hypothesis E. cultural carrying capacity