Neptune Flashcards
(31 cards)
What is the primary component of Neptune’s atmosphere?
Hydrogen (80%) and helium (19%), with methane contributing to its blue color.
Fill in the blank: Neptune has the strongest ________ in the solar system.
winds
What is the average distance of Neptune from the Sun in astronomical units (AU)?
Approximately 30.1 AU (4 300 000 000 km)
How many moons does Neptune have?
16 known moons
What is the largest moon of Neptune?
Triton
True or False: Neptune has a ring system.
True (Galle, Adams, Le Verrier)
What is the average temperature on Neptune?
About -214 degrees Celsius (-353 degrees Fahrenheit)
What type of planet is Neptune classified as?
Ice giant
What is the orbital period of Neptune around the Sun?
About 164.88 Earth years
Multiple choice: Which of the following is a characteristic feature of Neptune? A) It has a solid surface B) It has a Great Dark Spot C) It has no atmosphere
B) It has a Great Dark Spot
What is the name of the spacecraft that provided the first close-up images of Neptune?
Voyager 2
What is the rotational period of Neptune?
Approximately 16 hours, 6 minutes and 36 seconds
Fill in the blank: Neptune was discovered on…
September 23rd, 1846
What is the surface pressure on Neptune compared to Earth?
About 1.5 times that of Earth
What phenomenon is responsible for Neptune’s extreme weather patterns?
The planet’s rapid rotation and internal heat
Multiple choice: Which gas gives Neptune its blue color? A) Oxygen B) Methane C) Nitrogen
B) Methane
What is the density of Neptune compared to Earth?
About 1.64 grams per cubic centimeter
True or False: Neptune has a higher gravity than Earth.
True, 1.14g (11m/s2)
What is the primary reason Triton is unique among moons in the solar system?
It has a retrograde orbit.
Fill in the blank: The planet Neptune was named after the Roman god of ________.
the sea
What is the main reason why Neptune appears blue?
The absorption of red light by methane in its atmosphere.
Multiple choice: Neptune’s wind speeds can reach up to how many kilometers per hour? A) 500 B) 1,000 C) 2,100
C) 2,100
What is the albedo of Neptune?
About 0.41
True or False: Neptune has a completely solid surface.
False
