Inner Planets
Outer Planets
Dwarf Planets
Objects in Space
Space Exploration
100
The inner planets are terrestrial planets, which means this. 
What is earthlike?
100
This planet is bluish-green in color caused by methane gas. Has 27 moons. Probably mostly ice and rock. Looks like it is flipped on its side-- its axis of rotation is parallel to its orbit.
What is Uranus? 
100
Dwarf planets are _______than inner and outer planets. 
What is smaller?
100
These are referred to as dirty snowballs in space made of rock and dust particles, frozen gases, and ice.
What is a comet?
100
This powerful engine is used to send objects such as satellites or space probes into space.
What are rockets? 
200
This planet supports life- helped by its unique property of liquid water, atmosphere, and an ozone layer. Has one large moon.
What is Earth? 
200
This is the largest planet in the solar system. It has 66 moons. Has a giant red spot that is a huge storm.
What is Jupiter? 
200
This dwarf planet is located in the asteroid belt.
What is Ceres? 
200
These are the huge pieces of rocks--usually irregularly shaped.
What are asteroids?
200
This collects light from space and magnifies images of objects.
What are optical telescopes? 
300
This planet is closest to the Sun with extreme temperatures of -180 degrees Celcius and has no moons.
What is Mercury? 
300
Farthest from the Sun. Also bluish-green in color. Atmosphere can change rapidly. Has 13 moons and several rings.
What is Neptune? 
300
This dwarf planet was once considered the ninth planet until 2005.
What is Pluto? 
300
This is when a meteor strikes the Earth. 
What is a meteorite?
300
This is reusable and can transport satellites and astronauts to space.
What is the space shuttle? 
400
This planet looks red because of the iron oxide (rust). Has ice caps and rift valleys. 2 small moons.
What is Mars? 
400
This planet is the second largest planet with the lowest density. Mostly hydrogen and helium. Has a complex system of rings. Has a least 60 moons.
What is Saturn? 
400
This dwarf planet was discovered in 2005 by scientists and after they redefine the term "planet". 
What is Eris?
400
This is a meteoroid burning as it enters the Earth's atmosphere.
What is a meteor?
400
This is a building that houses telescopes.
What are observatories? 
500
This planet is close in size and mass to Earth. A dense atmosphere mostly carbon dioxide and a temperature of around 464 degrees Celcius.
What is Venus? 
500
The outer planets are often called this although they have rocky or metallic cores they are mostly made of a sludgy substance.
What are gas giants? 
500
They are called dwarf planets because their what is not strong enough to clear the orbital neighborhood of the major debris?
What is gravity?
500
This is a piece of space dust or rock. 
What are meteoroids?
500
This is a combination lab and apartment in space for astronauts.
What is the space station? 