A cathode ray beam is composed of
A. protons
B. electrons
C. atoms
D. nuclei
E. neutrons
B. electrons
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The cosmological principle states that the universe is I. expanding. II. accelerating. III. homogeneous. IV. isotropic
a. I and II b. III and IV c. I and III d. II and IV e. I, II, III, and IV
A planetary nebula is a(n) ____
a. expanding envelope of ionized gas expelled by a dying medium-mass star b. expanding envelope of neutral gas and dust expelled by a dying medium-mass star c. contracting envelope of dusty material from planets destroyed by a dying medium-mass star d. contracting envelope of ionized interstellar medium absorbed by a dying medium-mass star e. expanding atmosphere of a medium-mass star as it becomes a red giant
If a monkey floating in outer space throws his hat away, the hat and the monkey will both move
A) away from each other, but at different speeds. B) away from each other at the same speed. C) a short distance and then slow down. D) a short distance and then gain speed. E) quickly to a stop.
A(n) ______________ is a cohesive aggregate of one or more minerals
Fill in the blank(s) with correct word