Experiments cited in this chapter show that the distances away for both the Sun and the Moon are
A. closer to Earth than was thought in 1900.
B. about 110 times their respective diameters.
C. the same.
D. impossible to say
Answer: B
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A decline in the health of forests in Germany has been attributed to ____
A) erosion caused by excessive lumber cutting B) acid rain C) increased CO2 concentrations and global warming D) urbanization
Which of the following is least associated with economics?
A) A miner pans for gold in the mountains of California. B) An artist sells her paintings in an art gallery. C) Studying the sky, a child looks for faces in the clouds. D) A waitress carefully wipes down tables before heading home after a long day.
What divides European Russiafrom Siberia?
A) the Ural Mountains B) the eastern border of Ukraine C) the center of Siberia D) a line running from the Baltic to the Adriatic E) along the trans-Siberian railroad
Volcanic gasses and aerosols can create an acidic smog called _______________, which poses a threat to life and health
Fill in the blank with correct word.