The period of rotation for any of the Jovian planets is __________ than the Earth's period of rotation.
What is shorter.
100
Name the 4 terrestrial planets.
What is Mercury, Venus, Earth, and Mars
100
Which of the Jovian planets have rings?
What is all 4 of them!
100
The ________ _________ is a region beyond Neptune containing comets with short-period orbits.
What is Kuiper Belt
100
Pluto was recently reclassified as a ____________ planet.
What is dwarf
200
The total mass of all of the asteroids in our solar system is estimated to be only 1/1000 that of
What is Earth
200
the largest terrestrial planet
What is Earth
200
Which planet has an axis of rotation parallel with the plane of its orbit?
What is Uranus
200
_________ are pieces of rocky and metallic materials held together by frozen gases.
What is Comets
200
Pluto's orbit is very ______________.
What is elliptical
300
The _____________ planets have thicker atmospheres make of hydrogen, helium, methane, and ammonia. The __________ planets have thinner atmospheres.
What is Jovian and Terrestrial
300
Because of its similarities to Earth, _____________ has been referred to as Earth's twin.
What is Venus
300
The densities of the Jovian planets are about ________ times the density of water.
What is 1.5
300
Planets were originally formed when bits of matter collided and clumped together to form ______________________.
What is planetismals
300
Pluto is not a planet anymore because it is too ________.
What is small.
400
Some scientists believe that on ______________, a thick water-laden atmosphere once surrounded the planet, producing torrential downpours.
What is Mars.
400
The mass of Jupiter is about ______ times the mass of all the other planets and their moons.
What is 2.5
400
Most asteroids lie between the orbits of
What is Mars and Jupiter
400
True or False. Pluto is not considered a planet because it is not able to clear the neighborhood of its orbit.
What is True.
500
The ____________ planets formed only from metals and silicate minerals. The ____________ planets formed from these as well as from water, carbon dioxide, and methane.
What is Terrestrial and Jovian
500
____________ is the smallest planet in the solar system.
What is Mercury.
500
Which planet has the lowest surface temperature of any planet and an atmosphere comprised mostly of nitrogen?
What is Neptune
500
Scientists have been able to estimate the age of our solar system by dating these objects.
What is meteorites
500
True or False. Pluto is the largest dwarf planet and the first to be discovered.