That the moon has no magnetic field implies that
a. the moon is spinning too slowly to produce a magnetic field.
b. the interior of the moon is too hot to produce a magnetic field.
c. the crust of the moon is so thick that the magnetic field can not get out of the interior.
d. the moon's core contains little if any molten iron.
e. the moon is moving further from Earth.
D
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Current statistical evidence suggests that Earth-sized planets orbiting in the habitable zone are
A) extremely rare. B) likely to exist around at least about 20% of all stars. C) found around virtually all stars.
What is the main reason that Venus is warmer than Earth?
a. The Sun’s light is stronger for Venus since it is closer to the Sun than Earth. b. Venus has a higher reflectivity than Earth. c. Venus has a lower reflectivity than Earth. d. The greenhouse effect is much stronger on Venus than on Earth. e. Human presence on Earth has led to declining temperatures.
The Big Bang refers to
A. the origin of the heavy elements in a supernova. B. the creation of the Solar System. C. the origin of the Universe. D. the creation of the Moon. E. None of these choices is correct.
A rock is suspended from a scale reads 20.0 N. A beaker of water is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?
A) 1.60 × 103 kg/m3 B) 2.50 × 103 kg/m3 C) 2.33 × 103 kg/m3 D) 3.00 × 103 kg/m3 E) 2.67 × 103 kg/m3