Why were planets called "wanderers" by early Astronomers?
A) They move relative to the stars.
B) They move relative to the North Star, but not other stars.
C) They move in random paths across the sky due to their complex orbits around the Sun.
D) They move relative to the moon because of their orbits around the earth.
A
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In what reservoir does water reside for the longest time?
A. the ocean B. deep groundwater C. glaciers D. the biosphere
In the process of hydration, the entire water molecule is added to the mineral structure, stretching the crystal lattice. Which type of weathering would this process describe: physical or chemical? Why?
What will be an ideal response?
What is the minimum number of oxygen atoms present in an ester?
A) 1 B) 2 C) 3 D) 4
The mixing layer is a ____
a. very stable layer that extends from the surface up to the base of an inversion b. relatively unstable layer that extends from the surface up to the base of an inversion c. very stable layer found upward from an inversion d. very unstable layer that extends upward from an inversion e. relatively stable layer that extends from the surface to the base of an inversion.