Which of the following statements describes the ecliptic?
A. the extension of Earth's equator on the celestial sphere
B. the apparent path of the Sun across the celestial sphere
C. the path of the Moon on the celestial sphere
D. the extension of Earth's path on the celestial sphere
E. The extension of Earth's equator on the celestial sphere and the apparent path of the Sun across the celestial sphere are correct.
Answer: E
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During the Mesozoic, the supercontinent of Gondwanaland fragmented into the continents of
A) North America, Europe, and Asia. B) South America, Africa, Antarctica/Australia, and India/Madagascar. C) North America, Europe, and Africa. D) South America, Africa, and Europe/Asia.
The radio lobes of double-lobed radio sources are inflated by jets of excited gas emerging in two directions from the central galaxy
Indicate whether the statement is true or false
Two boundaries associated with seafloor spreading centers are
A) convergent boundaries and transform fault boundaries. B) divergent boundaries and transform fault boundaries. C) oceanic-oceanic boundaries and divergent boundaries. D) divergent boundaries and convergent boundaries.
An auto is moving at a steady 50 mph up a long straight [constant "slope"] incline. While it is on this incline,
A) its acceleration is zero but its velocity is not zero. B) its velocity and acceleration are both zero. C) its velocity is zero but its acceleration is not zero [i.e., it does have an acceleration]. D) neither its velocity nor its acceleration are zero. E) it has the heebie-jeebies.