A plane is moving due north, directly towards its destination. Its airspeed is 220 mph. A constant breeze is blowing from west to east at 50 mph. How long will it take for the plane to travel 220 miles north?
a. one hour
b. more than one hour
c. less than one hour
d. more information is needed
e. none of the above
b
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A solar eclipse that occurs when the moon's umbra does not reach Earth's surface is called
a. a total solar eclipse. b. a partial solar eclipse. c. an annular solar eclipse. d. a penumbral solar eclipse. e. an umbral solar eclipse.
What is unusual about the magnetosphere of Uranus? a. It is extremely small for the size of the planet
b. It can only trap a limited number of radiation particles. c. It has a corkscrew shape. d. Its poles are reversed. e. It has a bullet shape.
Almost all of our atmospheric gases lie in the
A) ozone layer. B) mesosphere. C) ionosphere. D) troposphere. E) stratosphere.
Why don't we see the constellation Orion all year?
a) As the Earth orbits the Sun, its nighttime side points to different constellationsat different points along its orbit. b) It is frequently eclipsed by the Moon. c) When we are close to Orion it appears bright, but when we are far away it gets toofaint to see. d) Half the year it is visible in North America, and the other half in SouthAmerica. e) It is not along the Ecliptic path and only the constellations of the Zodiac are visibleall year round.