NASA's Hubble Deep Field images and GOODS program observations have shown that ____
a. there are large patchy regions of the sky covered with galaxies separated by empty areas
b. the entire sky is thickly covered with galaxies
c. galaxies can be found in all directions, but are relatively rare
d. galaxies are densely concentrated in a disk structure, which contains the Milky Way
e. galaxies are concentrated in two opposite directions on the sky, with very few in between
b
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A two-dimensional coordinate system is called a(n) ______________ coordinate system
Fill in the blank(s) with correct word
A body of permeable rock through which groundwater moves is called
a. an aquifer. b. a water table. c. a porosity level. d. a zone of aeration.
Due to the incredible size of the universe, our search for extraterrestrial life will probably be limited to within our
A) Local Group of galaxies B) Local Supercluster of galaxies C) Milky Way galaxy D) solar system
When you look at a single slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the wavelength of the light is increased,
a. the pattern shrinks in size. (central maximum less wide; other maxima in closer to it) b. the pattern increases in size. (central maximum wider; other maxima farther from it) c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.