Unit 4 Flashcards
_____ is permanently frozen ground.
Permafrost
The term for Venus’ east to west rotation is _____.
retrograde
Hydrogen and helium in the atmosphere of _____ are thought to have been captured by incoming solar winds.
Mercury
What is the highest mountain on Mars?
Olympus Mons
The passage of one body across the disk of another is called a(n) _____.
transit
Dust devils are spinning columns of air that leave random patterns of dark streaks on the surface of _____.
Mars
A(n) _____ is an exact opposite.
antipode
A(n)_____ day is measured from noon to noon.
apparent
Because of it brightness, _____ is visible even in daylight.
Venus
discovered the two moons of Mars in 1877.
Asaph Hall
discovered Venus’ atmosphere in 1761.
Mikhail Lomonosov
made the first telescopic observation of Mercury.
Galileo Galilei
announced the presence of channels on Mars.
Giovanni Schiaparelli
first tracked Mercury in solar transit.
Pierre Gassendi
discovered that waves shift as a moving source passes a stationary observer.
Christian Doppler