Chapter 28 General Science
How many moons does Neptune have?
13+
How many moons does Mars have?
2
How many moons does Pluto have?
3
How many planets have natural satellites?
6 (7 including Pluto).
How many moons does Saturn have?
60+
Halley 's comet passes by Earth in its orbit every...?
76 years.
What is a comet?
A small body of ice, rock, & cosmic duct that that orbits the sun.
The largest of the minor bodies in the solar system are...?
Asteroids
How many moons does Uranus have?
At least 27.
How many moons does Jupiter have?
At least 63.
Most asteroids are found in the asteroid belt located...?
Between the orbits of Mars & Jupiter
What is the farthest Galilean moon to Jupiter?
Callisto
Asteroids are classified according to their...?
Composition
What's the names of Mars's two moons?
Deimos & Phobos.
What kind of orbit do comets follow?
Elliptical
What is the second closest Galilean moon to Jupiter?
Europa
How many Galilean moons does Jupiter have?
Four
What are asteroids?
Fragments of rock that orbit the sun.
What are the 4 largest moons of Jupiter called?
Galilean moons: Io, Europa, Ganymede, & Callisto.
What is the third closest Galilean moon to Jupiter?
Ganymede
Data from the Galilean spacecraft show that Io has a...?
Giant iron core & perhaps a magnetic field.
What space probe gathered info about Titan's atmosphere?
Huygens
The composition of asteroids is similar to that of the...?
Inner planets.
What is the closest Galilean moon to Jupiter?
Io
Titan's surface may contain lakes or oceans of...?
Liquid methane.
What do Scientists think might exist under Europa's crust?
Liquid water & perhaps simple forms of life.
The lava on Io is much hotter than that on Earth because the lava there has more...?
Magnesium & Iron.
The closest asteroids to the sun are inside the orbit of...?
Mars
Which 2 planets have no moons?
Mercury & Venus.
What was the fifth of Uranus's moons to be discovered?
Miranda
What planet does the moon, Triton, belong to?
Neptune
Asteroids that have a shiny & metallic appearance are mostly up of what...?
Nickel & iron
What planets have rings?
Saturn, Jupiter, Uranus & Neptune.
A comet's spectacular tails form when...?
Sunlight changes the comet's ice to gas
Io moves inward and outward in its orbit around Jupiter because of...?
The gravitational pull of Jupiter's other moons.
What is Saturn's largest moons?
Titan
Concentrated in groups just ahead of & just behind Jupiter as it orbits the sun are the...?
Trojan asteroids.
The flexing of Io's surface causes friction that heats and melts Io's interior, leading to...?
Volcanism
