The Planets and the Sun Crossword Puzzle

QUESTIONS LIST:

• jupiter : _ has a storm system known as the great red spot.
• rocky planets : the inner planets are often called the _ _ (two words).
• million : the sun is closer than other stars, but it is still 93 _ miles away from earth.
• mars : _ is often called the red planet because of its color.
• neptune : _ is the windiest planet in the solar system.
• mercury : _ looks like our moon because of meteorites from long ago.
• earth : this planet has an atmosphere that is mainly a mixture of nitrogen and oxygen.
• hydrogen : the sun is a massive ball of gas made of _ and helium.
• water : earth is the only planet in the solar system with liquid _ .
• venus : earth lies between _ and mars.
• greenhouse : venus' thick atmosphere traps heat because of the _ effect.
• billion : scientists think that our solar system is more than 4.6 _ years old.
• saturn : this planet is known for its rings that are made of ice and dust.
• uranus : methane gas gives this planet a blue-green color.