Which of the following statements about Earth's carrying capacity for humans is true?
a. Human beings are not unlike other animals concerning carrying capacity, but we utilize technology to artificially raise the carrying capacity increasingly higher.
b. Earth can support an infinite number of humans.
c. Earth's carrying capacity for humans is approximately 350 million people.
d. Humans do not have a carrying capacity because we are at the top of the food chain.
Answer: a. Human beings are not unlike other animals concerning carrying capacity, but we utilize technology to artificially raise the carrying capacity increasingly higher.
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With the rising temperatures of gases, atoms dissociate to become
A. plasmas. B. vapor. C. white hot. D. none of the above
The United States has no reserves of
A. tin, bauxite and potash. B. gold. C. chromium, cobalt, manganese and nickel. D. iron ore, lead and copper.
Two hundred million years ago Earth's continents were all joined in one supercontinent known as ________
A) Pangaea B) Gondwanaland C) Laurasia D) Tsunami E) Mantle
The arrows drawn perpendicularly to the contour lines on the contour map shown indicate the direction of the groundwater flow. In this example the groundwater is
A. flowing down the slope of the water table from higher contours to lower ones. B. flowing parallel to the slope of the water table from lower contours to higher contours. C. flowing up the slope of the water table from lower contours to higher contours.