Scientific Knowledge Challenge
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Questions and Answers

Which of the following nitrogenous bases is found in DNA?

  • Adenine (A) (correct)
  • Thymine (T)
  • Guanine (G)
  • Cytosine (C)

    • Which of the following elements are contained in all atoms?

  • Carbon and nitrogen
  • Hydrogen and oxygen
  • Oxygen and nitrogen
  • Carbon and hydrogen (correct)

    • Which type of crust has more silicon and potassium, but less iron, magnesium, and calcium?

  • Continental crust (correct)
  • Both continental and oceanic crust
  • Oceanic crust
  • Neither continental nor oceanic crust

    • What percentage of the Earth's surface is covered with water?

    <p>71%</p> Signup and view all the answers

    At what temperature does the absorbed energy warm the surface of the Earth to, resulting in radiated infrared heat?

    <p>255 K</p> Signup and view all the answers

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