An asteroid is in orbit at 4 times the Earth's distance from the Sun. What is its period of revolution?
a. one fourth year
b. 4 years
c. 8 years
d. 16 years
c
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At the chemical composition of iron and 4.26 weight percent carbon and a temperature of 1153°C, there is a(n) _________reaction.
Fill in the blank(s) with the appropriate word(s).
Orthoclase and plagioclase are the two main types of
a. silica. b. feldspars. c. calcite. d. sulfides.
An uncharged pith ball is suspended by a nylon fiber. When a negatively-charged rubber rod is brought near the pith ball, without touching, the ball
A) becomes charged by induction. B) becomes polarized. C) is repelled by the rod. D) is unaffected. E) none of the above
The inability to observe parallax of stars contributed to the ancient Greek astronomers' rejection of the idea that Earth revolves around the Sun.
Answer the following statement true (T) or false (F)