Counting out from the Sun, which planet occupies the position after Jupiter?
A. Earth
B. Mars
C. Saturn
D. Venus
E. Neptune
Answer: C
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Based on observations by the Dawn spacecraft, scientists have concluded that Vesta might be:
A) a planetesimal leftover from the solar system's formation. B) the only remaining protoplanet in our solar system. C) one of the dwarf planets in our solar system. D) a fragment of Mars. E) one of the remnants of the planet that broke up to form the asteroid belt.
In straight-line motion, if a moving object speeds up, the direction of the acceleration is ______________ the direction of the velocity
Fill in the blank(s) with correct word
The two teams involved in the discovery of the cosmic microwave background radiation were at:
A) NRAO and Cal Tech. B) JPL and the Hubble Space Institute. C) Kitt Peak and the University of Arizona. D) Bell Labs and Princeton. E) Mt. Palomar and the VLA.
Why do Uranus and Neptune have blue methane clouds but Jupiter and Saturn do not?
A) Methane does not condense into ice in the warmer atmospheric temperatures of Jupiter and Saturn. B) Methane did not exist in the solar nebula at the radii of Jupiter and Saturn when the planets formed. C) The greater gravitational force of Jupiter and Saturn prevents the methane from rising to the upper edges of the atmosphere. D) Methane reacts with the abundant ammonia clouds in Jupiter and Saturn. E) The relatively slow rotation of Uranus and Neptune allows methane to migrate to higher levels in the atmosphere and condense into clouds.