Terrestrial Planets trivia
Terrestrial Planets Mini Quiz
Test your knowledge with these top questions!
What is the primary astronomical driver of seasons on Mars?
Mars' 25° axial tilt is its primary seasonal driver, though its eccentric orbit also creates significant secondary temperature variations.
How did the Kepler mission detect Kepler-10b?
As Kepler-10b crossed its star, the planet blocked a tiny amount of starlight and produced a repeating dip.
Why is Venus hotter at its surface than Mercury?
Venus's dense carbon-dioxide atmosphere traps infrared heat so efficiently that its surface is hotter than Mercury's.
Why can observers usually see Mercury only near sunrise or sunset?
Because Mercury orbits closer to the Sun than Earth, the planet never strays far from the Sun in our sky.
How does Venus's sidereal day compare with its year?
Venus rotates once every 243 Earth days but orbits the Sun in about 225 days, making its sidereal day longer.
Venus's bright cloud layers mainly contain:
Venus's cloud decks contain sulfuric acid droplets, not water clouds; the planet's surface stays hidden below them.
Why does Mercury have long cliffs called scarps?
As Mercury's interior cooled, the planet contracted, squeezing its crust into the long lobate scarps seen across its surface.
What kind of exoplanet is Kepler-10b?
At about 1.5 Earth radii and 3.3 Earth masses, Kepler-10b is far smaller and denser than a gas giant.
What gives Mars much of its reddish color?
Iron minerals in Martian dust oxidized, forming rust-like compounds that tint the surface red.
What kind of rotation does Venus have compared with Earth?
Venus rotates opposite Earth's direction, so the Sun appears to rise in the west and set in the east.