Central Idea Bell Ringer

Benjamin Franklin loved the city of Philadelphia.  He started the city’s first hospital and fire department.  Ben also started Philadelphia’s first public library. Benjamin Franklin worked very hard to make Philadelphia a better place to live.

• Benjamin Franklin worked hard to make his city a great 
    place to live. 
• Benjamin Franklin worked for the fire department. 
• Benjamin Franklin knew a lot about books.
• Benjamin Franklin went to school in Philedelphia.

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Benjamin Franklin loved to write.  When he was twenty-two, he set up his own printing shop and started a newspaper.  He also printed a book called Poor Richard’s Almanac.  It had funny stories, information about the weather, and wise sayings.

• Benjamin Franklin loved to write stories and books.
• Benjamin Franklin worked very hard when he was young.
• Benjamin Franklin knew a lot about the weather.
• Benjamin Franklin was very poor.

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Benjamin Franklin was very interested in electricity.  One day he tried a very dangerous experiment to prove that lightning was electricity.  He attached a key to a kite string and flew the kite during a thunderstorm.  When the lightning hit the kite, sparks flew from the key.  Benjamin Franklin proved that lightning was electricity.

• Benjamin Franklin liked to play in the rain.
• Benjamin Franklin performed an experiment that proved
  lightning was electricity. 
• Benjamin Franklin knew a lot about thunderstorms.
• Benjamin Franklin invented a new kind of kite.

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Benjamin Franklin invented many things that made life easier in the late 1700’s.  He invented the lightning rod that saved many homes from fires.  He also invented the Franklin stove.  The stove could heat a room better than a fireplace and saved people a lot of fuel.  He also invented a special kind of glasses called bifocals.  This new kind of glasses helped people to read better.

• Benjamin Franklin thought reading was important.
• Benjamin Franklin was not afraid of fire.
• Benjamin Franklin was a great inventor.
• A Franklin stove can heat a whole room.

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There are several events that can change the Earth's surface very quickly. Volcanoes can erupt and spread lava, rock and ash for several miles.  Earthquakes can leave large cracks in the Earth's surface.

• Several events can change the Earth's surface.
• Earthquakes can cause large cracks. 
• Volcanoes can be dangerous.

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What is the main idea?
  Bears and Honey
Did you know bears love honey.  Bears like to eat honey because it is sweet.  Bears look for honey in the woods.  A bear will climb a tree to get honey.  Bears will eat all the honey they find.  

• Bears like to eat pie.
• Bears like to eat honey. 
• Bears like to climb trees.
• Bears like to catch bees.  

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What is the  main idea?
  The Zoo
Have you ever been to the zoo? Many animals live at the zoo. There are big animals and little animals to see. You can ride the trolley to see the animals with spots. You can feed the animals with long necks. The zoo is a great place to see and learn about animals.

• A zoo is a good place to learn about hats.
• There are many people at the zoo.
• The zoo is a place to see many animals.
• You can ride a trolley at the zoo.

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What is the main idea?
  Grandmother's Garden
Grandmother has a garden. She has many flowers in her garden. They are red, yellow, pink and white. Some flowers are big. Some are small. Grandmother likes flowers very much.

• Grandmother works in the garden.
• Grandmother grows many flowers.
• Grandmother loves vegetables.
• Grandmother has a vegetable garden. 

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For years scientist have wanted to know the spider's secret.  The threads of spider webs are so tiny, yet so strong.  How can these threads be so strong?  Now scientists have found out.  The inside of the spider's thread is soft.  It helps the web stretch without breaking.  The outside of the web is hard and strong.  This paragraph mainly tells:

• who makes thread soft
• how spiders make strong thread
• how scientists make strong thread
• why spiders spin webs

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In 2012, Instagram made its 26-year-old creators, Stanford grads Kevin Systrom and Mike Krieger, instant multimillionaires when they sold their app company to Facebook developer, Mark Zuckerberg, for $1 billion. In fact, all 13 employees became millionaires. How popular is the millionaire-making app? If you printed off the 21.9 billion photos uploaded to Instagram in a year, it would span 4,693 miles - farther than Orlando is from the North Pole!
Which supporting detail would best fit into this paragraph?

• All 13 joined the company in its first year.
• Facebook is most popular among moms.
• Stanford University, like Harvard College, is an Ivy League school.
• Santa and the elves reside at the North Pole.

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