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								SOLAR SYSTEM LESSON  Directions:  Print the Solar System   reading 
                                    comprehension passage and questions (see 
                                    below). Students should read the passage 
	silently, then answer the questions.  Teachers may also use the text as 
	part of a classroom lesson plan.  Lesson Excerpt      Our solar  system is the system of planets and other objects that orbit our sun.  It has many parts.  Our sun, the star of our solar system, holds  everything in place by its gravity.   There are eight planets and many moons.   There are asteroids and comets.   There are meteoroids and tiny particles of rock and dust.  The sun, which is actually a star, is the  largest object in the solar system.  It  contains more than 99% of the mass of the solar system.      What is a  star?  A star is a huge body in space  made of gases that is held together by its own gravity.  It makes heat and light by the chemical  process of nuclear fusion.  This process  combines hydrogen atoms by joining them or fusing them together.  When this happens, a huge amount of energy is  released. Our sun is an average-sized star that is about half way through its  life cycle.  It should continue making  heat and light for another 5 billion years!      Our sun  provides all the energy for life on Earth.   Without its heat, Earth would be too cold to live on.  Without its light, plants could not grow, and  there would be no food for people and animals.  Continued...    More  Science 
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