The motion of the Earth, the Sun, and the entire solar system in an orbit around the center of the Milky Way Galaxy is known as ____
a. rotation
b. cosmic movement
c. galactic movement
d. revolution
e. ecliptic drift
c
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In the 19th century, the famous physicist Lord Kelvin estimated the age of Earth to be much much less than its present estimate. What information did Kelvin not have to account for his error?
A. Lord Kelvin was not aware of radioactive decay, a source of energy to keep Earth warm for billions of years. B. Lord Kelvin knew only classical physics and had no knowledge of anthropological dating. C. Lord Kelvin never gave any estimate of the age of Earth. D. Lord Kelvin had no knowledge of radio waves for measuring distance and age of planets since they have not yet been introduced into science.
In the Northern Hemisphere, warm currents tend to flow from the ________. In the Southern Hemisphere, cold currents tend to flow from the ________.
A) south; south
B) north; north
C) south; north
D) north; south
If the 1967 Arab-Israeli war had not taken place, then
A. Palestinians would be Jordanian citizens. B. Israel would have allowed Palestinian refugees to return to Israel. C. Jerusalem would be the capital of a Palestinian state. D. there would have been no need for an Oslo Accord.
As chemical pesticides move through the trophic pyramid, they may be amplified at each higher level in a process called
A) competitive exclusion. B) trophic cascading. C) biomagnification. D) pyramidal decay.