Asteroid Zooms Past Earth
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Questions and Answers

At what speed did the asteroid pass by Earth in 2021?

  • About 50,000 miles per hour
  • About 77,000 miles per hour (correct)
  • About 100,000 miles per hour
  • About 30,000 miles per hour

    • How wide was the asteroid that passed by Earth in 2021?

  • About 1,000 feet wide
  • About 4,000 feet wide
  • About 3,000 feet wide
  • About 2,230 feet wide (correct)

    • What happens to most asteroids that enter Earth's atmosphere?

  • They land safely on Earth's surface
  • They burn up in it (correct)
  • They travel back into space
  • They explode in mid-air

    • What is the estimated number of years ago that a huge asteroid slammed into Earth?

    <p>About 65 million years ago</p> Signup and view all the answers

    What do scientists use to track big asteroids?

    <p>Powerful telescopes</p> Signup and view all the answers

    According to NASA's Lindley Johnson, how far in advance will scientists spot large asteroids?

    <p>Many years, if not centuries, before they are a threat</p> Signup and view all the answers

    What is believed to have killed the dinosaurs?

    <p>A worldwide cloud of dirt and rock</p> Signup and view all the answers

    What is the primary reason scientists track asteroids?

    <p>To predict potentially hazardous asteroids</p> Signup and view all the answers

    What is a common fate of many asteroids that enter Earth's atmosphere?

    <p>They burn up in the atmosphere</p> Signup and view all the answers

    What is the scale of the asteroid that passed by Earth in 2021?

    <p>Comparable to a jumbo jet</p> Signup and view all the answers

    What event in Earth's history is linked to a massive asteroid impact?

    <p>The extinction of dinosaurs</p> Signup and view all the answers

    What is the main benefit of tracking asteroids, according to Lindley Johnson?

    <p>It allows us to prepare for potential threats</p> Signup and view all the answers

    How many years ago did a massive asteroid impact Earth, according to scientists?

    <p>65 million years ago</p> Signup and view all the answers

    What is the purpose of NASA's asteroid tracking efforts, according to the text?

    <p>To prepare for potential asteroid threats</p> Signup and view all the answers

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