Chapter 22 Flashcards
What are clusters of billions of galaxies (all of space.) called?
Universe
What is a galaxy?
A group of billions and billions of stars that form the basic unit of the universe
What is our galaxy called?
The Milky Way
What is a solar system?
A system of bodies or being around a single star
What is the order of the planets?
Mercury, Venus, earth, Mars, Jupiter, Saturn, Uranus, Neptune.
What’s the orbital plane?
The plane in which all our planets orbit
What are terrestrial planets? (Earth-like)
Mercury, Venus, earth, mars
What are the Jovian planets?
Jupiter, Uranus, Neptune
What are the dark, smooth low lands on the moon called? (Hint: “sea”)
Maria
What are highlands?
Bright, densely catered regions on the moon
What are produced by the impact of meteoroids?
Craters
What is Ejecta?
Occasional rays of dust around craters
What is lunar regolith?
Gray, soil like layers on the moon’s surface
What is the volcano on Mars that is the largest in the solar system called?
Olympus Mons
What is the canyon on Mars (that is the largest in the solar system) called?
Valles Marineras
What are Mars moons called?
Phobos and Deimos
Which is Jupiter‘s largest moon (it is also the largest in the solar system)
Ganymede
What is Jupiter’s smallest Galilean moon called?
Europa
What is Jupiter’s outermost Galilean moon called?
Callisto
What is Jupiter’s innermost Galilean moon called?
Io
What is Saturn’s largest moon called? (it is the second largest in the solar system.)
Titan
What is Uranus’s largest moon called?
Titania
What is Neptune’s largest moon called?
Triton.
What are the planets mainly composed of?
- Gases.
- Rocks.
- Ices
What is Pluto?
A dwarf planet or planetoid
What is the name of Pluto’s only moon?
Charon
What are asteroids?
Small, irregular in shape and orbit- solid rock
What is a comet?
Frozen gases on a rock “ dirty snowballs”
What is a coma?
The glowing head of a comet
What is the most famous short period comet?
Halley’s Comet (76 yr orbit period)
What are small asteroids in space called?
Meteoroids
What are meteoroids in the earths atmosphere called?
Meteors
What is a meteor shower?
A swarm of meteorites associated with a comets path
What are meteoroids found called when they are found in earth’s surface?
Meteorites
