Alternating lines of blue and red on a surface weather chart indicate a(n)
a. cold front.
b. warm front.
c. stationary front.
d. occluded front.
e. dryline.
ANSWER: c
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Nuclear fission is the splitting of electrons in the outer shell of an atom.
Answer the following statement true (T) or false (F)
A high concentration of eagles that spend several days in a small region is most likely the result of __________.
a. a major predator in the region b. a big and comfortable perch in a tree c. a centralized breeding area d. concentrated food
What is a characteristic of the greenhouse effect?
A)Short wavelength radiation from the sun is reflected back into space. B)Most of Earth's radiant energy escapes into space. C)Industrialization plays an exclusive role in the process. D)Gases trap heat reflected back from Earth's surface. E)Transpiration significantly increases levels of greenhouse gases.
Which group consumes one-fifth of the world's energy, while only making up one-twentieth of Earth's population?
A) Americans B) Chinese C) Indians D) Europeans E) Russians