Which observation supports the theory that the planets formed from a disk shaped nebula?
A) The rocky planets are close to the Sun.
B) Pluto and comets follow elliptical orbits that pass inside the orbit of Neptune.
C) The planets revolve around the Sun in approximately the same plane of the ecliptic.
D) The Sun is the center of the solar system.
C
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An earthquake measures 5.0 on the Richter scale. Therefore
A) the ground shakes 10 times as much as it does during a magnitude 4.0 earthquake. B) 10 times as much energy is released as during a magnitude 4.0 earthquake. C) 10 times as much damage is done to buildings as there is in a magnitude 4.0 earthquake. D) The earthquake is 10 times deeper compared to a 6.0 earthquake.
Which of the following is true of fevers?
A) An increase in body temperature never has beneficial effects. B) A 1°C increase in temperature can be protective. C) A 3°C increase in temperature is invariably fatal. D) None of the above is true.
Glaciers represent ____% of the total freshwater on the surface of the Earth
a. 97.1 b. 2.24 c. 0.306 d. 0.009
Despite dire predictions in the past, humans still inhabit Earth. A few economists would argue that this is because ________.
a. Malthus overestimated Earth's environmental sensitivity b. world population growth has been slower than expected c. technological developments have alleviated some of the strain on - Earth's resources d. Malthus's measurements were inaccurate e. space exploration has revealed new frontiers