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Aliens from Earth

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  • Who sped up the the pace (made it faster) of alien invasions?
    Humans (!!!)
  • Name one thing you can do to help solve the problem of alien invasion.
  • Correct the sentence: You haven't to wear uniform in the sixth form.
    don't have to
  • Why did ecosystems stay in balance for most of Earth's history?
    Because they could change GRADUALLY over time.
  • You have been walking for ten hours. You ______ exhausted.
    can be
    must be
  • Where did the killer bees in Brazil originally come from?
    Africa
  • Correct the sentence: He doesn't should talk to people like that.
    shouldn't
  • What did the US government do in the 1930s that sped up the spread of kudzu?
    It hired hundreds of workers to plant kudzu (because they believed kudzu helped prevent soil from being washed away).
  • Correct the sentence: You really should to go and see a doctor about that.
    should go
  • How do rabbits upset the native ecosystems in Australia?
    They destroy soil, damage farmer's crops, and wreck (=destroy) the habitat of native species.
  • How can alien invaders dangerous to an ecosystem?
    They upset the balance of an ecosystem.
  • Correct the sentence: You must to see the Chrysler Building when you're in New York.
    must see
  • What does a healthy ecosystem need?
    A balance between prey and predators
  • Why do kudzu plants grow faster in the southern part of the US than in Japan?
    Because the climate there is warm and humid, which is good for kudzu.
  • Name three things humans do that speed up the pace of alien invaders?
    hunt, gather, farm
  • I think there ______ a mistake in your tax return. You should check it.
    must be
    might be
  • Which places are in big danger from alien invasions today?
    islands (like Australia)
  • Name three ways zebra mussels are harmful.
    They sink buoys. They clog pipes. They eat the plankton, leaving the fish little food.
  • How did zebra mussels travel from Europe to the United States?
    on cargo ships (that have ballast tanks!)
  • Correct the sentence: Do I should call him?
    Should I call him?
  • How did living things travel from one place to another millions of years ago?
    By crossing land bridges between continents
  • How does kudzu damage forests?
    It covers trees and makes it difficult for them to get sunlight.
  • Correct the sentence: We don't must make any noise; my grandfather's sleeping.
    mustn't
  • What is the name of the aggressive kind of bird imported to the US from England?
    starling(s)
  • If Suzan said that, it ______ true. She never lies.
    can't be
    must be
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