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ch12 - MULTIPLECHOICE. 1 Acatstrolls acrossyour backyard...

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  MULTIPLE CHOICE.  Choose the one alternative that best completes the statement or answers the question.  1) 
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A cat strolls  across your  backyard.  An hour  later, a dog  with its nose  to the  ground  follows the  trail of the  cat. Explain  what is  going on  from a  molecular  point of  view. 
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1)  _______  A)  T h e   d o g   i s   f o l l o wi ng  the  are as  of  inc rea sed  de nsi ty  of  the  Ear th.  T h d o g is  smelling  molecule s from  the cat. 
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The cat is leading the  dog into a trap.  D) 
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The dog is smelling  atoms from the cat.    2) 
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If all the  molecules of  a body  remained  part of that  body, would  the body  have any  odor? 
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2)  _______  A)  Y e s ,   b e c a u s e it  wo uld  stil rel eas ph oto ns.  Y e s,  b ut only if  that body  is  sweating. 
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No, because there  would be no molecules traveling to our nose.  D) 
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No, because it would no  longer be what it was.    3) 
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Which are  older, the  atoms in the  body of an  elderly  person or  those in the  body of a  baby? 
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3)  _______  A)  a n   e l d e r l y   p e r s o n  be cau se  the ha ve  bee aro un mu ch  lon ger  It  d e pends  upon  their diet. 
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They are of the same  age, which is appreciably older than the solar system.  D) 
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a baby because this is  surely a trick question    4) 
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Where did  the atoms  that make up  a newborn  baby  originate? 
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4)  _______  A)  i n   t h e   w o mb  of  the  ba by' mo the i t h Earth  through  geologica processes 
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in the digestion of the  food that the mother ate  D) 
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in the explosions of  ancient stars    5) 
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In what  sense can  you  truthfully  say that you  are a part of  every person  around you? 
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5)  _______  A)  W e   a r e   c o n tin ual ly  exc ha ngi ng  our  ato ms.  T h e r a re more  people  alive  now than  have ever  lived. 
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We all live on the same  planet and share the same resources.  D) 
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