Geological eras are subdivided into

A) eons
B) periods
C) epochs
D) ages


B

Physics & Space Science

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The diagram below illustrates the layout and light path of a reflecting telescope of the ____________________ design

Fill in the blank(s) with correct word

Physics & Space Science

What is true of spiral galaxies?

A) They are much less common at larger redshifts. B) They are relatively rare in regions of high galaxy density. C) They are only found in the center of rich galaxy clusters. D) They have never been seen to have large redshifts. E) They evolve from giant ellipticals.

Physics & Space Science

When light is refracted, there is a change in its

A) frequency. B) wavelength. C) both of these D) neither of these

Physics & Space Science

When carbon combines with oxygen, energy is released to the surroundings. Thus this reaction

a. is an acid–base reaction. b. is endothermic. c. never reaches equilibrium. d. is exothermic.

Physics & Space Science