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Solar System
Terrestrial Planets
Jovian Planets
Other Space Objects
Miscellaneous
100
Scientists believe this is how the solar system formed.
What is a rotating disk of dust and gases?
100
Earth is the largest of these.
What is the terrestrial planets?
100
1.5 times the density of water.
What is the density of the Jovian planets?
100
Most asteroids lie between the orbits of these two planets.
What is Mars and Jupiter?
100
These can come from leftover interplanetary debris, material from the asteroid belt, or the solid remains of comets.
What are meteoroids?
200
Scientists estimate the age of our solar system by dating these.
What is meteorites?
200
The terrestrial planets.
What are Mercury, Venus, Earth, and Mars?
200
The diameters of these planets are much larger.
What are the Jovian planets?
200
Impact craters on the moon were likely caused by these.
What is asteroids?
200
A meteoroid that reaches Earth's surface.
What is a meteorite?
300
This is not classified as a terrestrial or Jovian planet. In fact, it's no longer a planet.
What is Pluto?
300
Earth's twin
What is Venus?
300
These Jovian planets have rings.
What are Saturn, Jupiter, Uranus, & Neptune?
300
These are held together by frozen gases.
What is comets?
300
This planet has an axis of rotation parallel with the plane of its orbit.
What is Uranus?
400
Formed when bits of matter collided and clumped together.
What are planetesimals?
400
These planets formed from metals and silicate minerals.
What is terrestrial planets?
400
The diameter of the Jovian planets compared to the terrestrial planets is this.
What is much larger?
400
A region beyond Neptune containing comets with short orbit periods.
What is the Kuiper Belt?
400
Comets with long orbital periods form a spherical shell around the solar system.
What is the Oort Cloud?
500
The theory that suggests the solar system formed from a rotating disk of gas and dust.
What is the Nebular Theory?
500
The atmospheres of the terrestrial planets differ from the Jovian planets in this way.
What is thinner?
500
The period of rotation for any of the Jovian planets is ____________ than Earth's period of rotation.
What is shorter?
500
The nucleus of this comet is 16 km by 8 km.
What is Halley's comet?
500
The total mass of all the asteroids is estimated to be only 1/1000 of this planet.
What is Earth?