________ is the speed required for an object to escape a planet's gravitational force.
A) Obliquity
B) Impact weathering
C) Escape velocity
D) Terminal velocity
Q. 2 - What was the name of the manned space missions that have successfully landed on the surface of the moon?
A) Apollo
B) Gemini
C) Mercury
D) Sputnik
Q. 3 - What is a planetesimal?
A) A rotating cloud of interstellar gases
B) A celestial body that orbits the sun but cannot clear its own neighborhood
C) Rocky material accreted through repeated collisions
D) The core of a star that has gone through a nova
Q. 4 - What substance makes up the core of large Jovian planets like Saturn?
A) Mercury
B) Hydrogen
C) Iron
D) Ice
Q. 5 - Which of the following processes created the lunar maria?
A) Solar winds eroded wide, shallow basins, which were later filled with ejecta.
B) Large impact craters were then filled with basaltic lava flows.
C) Liquid water flowed across the landscape, which later froze.
D) Rocks exposed to the solar winds oxidized.
Q. 6 - The ________ explains the formation of the solar system by describing how the sun and planets formed from a rotating cloud of interstellar gases.
A) transit of Venus
B) escape velocity
C) nebular theory
D) theory of plate tectonics
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