Most soil erosion is caused by
a. wind and moving water
b. Photosynthesis
c. earthquakes
d. volcanoes
e. excess heat
A
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Referring to the diagram, sunlight energy is added at equal rates to soil and water. Which of the following factors contributes to the different temperatures of the two surfaces?
A. angle of the sun on the horizon B. heat capacity C. composition of the overlying atmosphere D. time of the year
What are the four basic forces in the universe?
a. gravity, electric, magnetic, and strong nuclear b. gravity, electromagnetic, strong nuclear, and atomic c. gravity, electromagnetic, strong nuclear, and weak nuclear d. gravity, electric, magnetic, and atomic e. gravity, electromagnetic, atomic, and nuclear
The percent of infants within a population that die before age one
A. Infant Mortality Rate B. Death Rate: C. Total Fertility Rate: D. Birth Rate:
Biomagnification is a concentration of toxins
A. Within certain cells of the body B. Within the liver as an organism gets older C. within cells of predators as they consume and store the toxins that were in the bodies of their prey. D. Within the bodies of organisms at low trophic levels E. None of these is true regarding biomagnification