What is a meteor?
A. the object that causes a "shooting star," but before it passes through the atmosphere
B. any one of the large rocky bodies that orbit the Sun, primarily between Jupiter and Saturn
C. a space rock that survives its fall through Earth's atmosphere and reaches the ground
D. a glowing trail of hot gas and debris heated by friction as an object moves through the atmosphere
Answer: D
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A person in a boat sees a fish in the water (n = 1.33), the light rays making an angle of 40° relative to the water's surface. What is the true angle (in degrees) relative to the water's surface of the same rays when beneath the surface?
A. 40 B. 35 C. 50 D. 55 E. 61
Which of the following is not one of the three major categories of galaxies?
A) irregular galaxies B) elliptical galaxies C) globular galaxies D) spiral galaxies
Which of the following volcanoes is in the United States?
a. Paracutin b. Surtsey c. Mount Pelée d. Mount Saint Helens
That light can undergo interference is evidence that it:
a. has a phase of 180°. c. behaves like a wave. b. has electric properties. d. is made of corpuscles.