The surface of Venus is much hotter than the Earth because it
A) has no magnetic field
B) has a very thick atmosphere of carbon dioxide
C) has a much higher rate of volcanic activity
D) is closer to the Sun
B
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The Voyager 2 Spacecraft is currently on its way out of our solar system at a speed of about 50,000 kilometers per hour. It will reach the distance of the nearest star system (beyond our solar system) in about ________ years.
A) 100 B) 1000 C) 10,000 D) 100,000 E) 1,000,000
Six kilograms on Earth has what mass on the moon?
A) 1. pound B) 6. kg C) 36. kg D) 1/6 kg E) 1. kg
Which of the following observations lend support to the big bang theory?
A) the cosmic background radiation B) the ripples, or variations, in the cosmic background radiation C) Both of the above. D) the "red shift" of the light from distant galaxies E) All of the above.
Rutherford's experiments involving the use of alpha particle beams directed onto thin metal foils demonstrated the existence of which of the following?
a. proton c. nucleus b. neutron d. positron