If you see Polaris directly overhead at midnight, you must be at
A) the South Pole. B) the North Pole.
C) the equator. D) the Tropic of Cancer.
B
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The hydrogen in our solar system was created from subatomic particles in ______
a. the Earth b. our sun c. Jupiter d. the Big Bang e. supernovas
When the Sun is on the horizon, it is actually lower than it appears because of
a. refraction. b. dispersion. c. scattering. d. reflection.
If our solar system hadn't formed with a Jupiter-sized planet,
A) the Sun would have been more massive, with a lifetime too short for life to evolve B) the Earth would have never formed C) the rate of impacts on the Earth may have been much higher, possibly preventing the appearance of life D) the rate of impacts on the Earth may have been much lower, enabling the appearance of life much earlier
Plane A is flying at 440 mph in the northeast direction relative to the Earth. Plane B is flying at 550 mph in the north direction relative to the Earth. What is the speed of Plane B as observed from Plane A?
a. 570 mph b. 916 mph c. 392 mph d. 704 mph e. 714 mph