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JS5 - U78 - Day 10

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  • In 1954, why did about 50,000 birds die?
    They flew straight into the ground because of the spotlights at a US Air Force.
  • What creates harmful acid rain?
    Sulfur dioxide creates harmful acid rain.
  • If turtles go into streets and parking lots, what will happen to them?
    Cars can run over them.
  • When did astronomers start to know about light pollution?
    They began to realize it in the 1970s.
  • Why did stars 'disappear'?
    City lights made them impossible to see.
  • According to David Crawford, how can people stop light pollution?
    Lights should point at the ground, not at the sky.
  • Is it true that if people use more lights, light pollution is going to happen?
    True
  • What makes birds fly in the wrong direction?
    Lights from buildings make them veer off course.
  • What does Travis Longcore do?
    He's an ecologist.
  • How do birds use the stars?
    They use the stars like street signs to find their way.
  • How many stars could people see one hundred years ago?
    They could see about 1,500 stars.
  • How do baby turtles know their way to the sea?
    Starlight and moonlight shining on the water pull them toward the sea.
  • Why does excess light create light pollution?
    It reflects onto low clouds, causing a sky glow that blots out the stars.
  • What do female sea turtles come ashore to do?
    They lay eggs in the sand.
  • What problem does carbon dioxide cause?
    Carbon dioxide traps heat near the Earth's surface, causing global warming.
  • How much lighting in the US is not used effecttively?
    About one-third of all lighting in the United States is wasted.
  • What word from the text means 'things people do'?
    human activity
  • What causes light pollution?
    It is caused by excess light that is beamed into the sky.
  • What word means 'active at night'?
    nocturnal
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