Social networking sites harm children's brains

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Across
  1. 3. What is the Wonder, Spend, Love, Computer
  2. 5. How many millions have signed up to Twitter
Down
  1. 1. Sites such as Facebook, Twitter and Bebo are said to shorten attention spans.(Mark Zuckerberg made this platform.)
  2. 2. Director of the Royal Institution, ....... repeated exposure. (Believe in third person singular)
  3. 4. Social networking sites shorten teenagers attention span and leed to egotistical and antisocial behaviors.