Near Earth Objects: A Quiz To Test Your Knowledge!

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Near Earth Objects: A Quiz To Test Your Knowledge! - Quiz

Near-Earth objects (NEO) are any small solar system body whose orbit brings it to close to Earth. Most known PHOs and NEOs are asteroids, but a small fraction is comets. The United States, the European Union, and other nations are searching for NEOs through a program which is referred to as Spaceguard. NEOs have low surface gravity, and many have Earth-like orbits making them easy targets for spacecraft. This quiz is to test your knowledge on these Near Earth Objects.


Questions and Answers
  • 1. 

    Which of the following qualifies a solar system body as a NEO?

    • A.

      If its closest approach to the sun is less than 1.3 astronomical units 

    • B.

      If its closest approach to the sun is less than 1.7 astronomical units 

    • C.

      If its closest approach to the sun is less than 1.5 astronomical units 

    • D.

      If its closest approach to the sun is less than 1.4 astronomical units 

    Correct Answer
    A. If its closest approach to the sun is less than 1.3 astronomical units 
    Explanation
    A solar system body qualifies as a NEO if its closest approach to the sun is less than 1.3 astronomical units. This means that the body's orbit brings it closer to the sun than the distance between the sun and Earth at its closest point. This criterion is used to categorize objects that have the potential to come close to Earth's orbit and potentially pose a risk of collision.

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  • 2. 

    When is a NEO considered a potentially hazardous object?

    • A.

      If its orbit crosses the Earths and it's larger than 140 meters 

    • B.

      If its orbit crosses the Earths and it's larger than 120 meters 

    • C.

      If its orbit crosses the Earths and it's larger than 100 meters 

    • D.

      If its orbit crosses the Earths and it's larger than 130 meters 

    Correct Answer
    A. If its orbit crosses the Earths and it's larger than 140 meters 
    Explanation
    A Near-Earth Object (NEO) is considered a potentially hazardous object if its orbit crosses the Earth's orbit and it is larger than 140 meters. This means that the NEO has the potential to come close to Earth and pose a threat of impact due to its size and proximity.

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  • 3. 

    There are how many known NEOs?

    • A.

      19,220

    • B.

      19,000

    • C.

      19,229

    • D.

      18,589

    Correct Answer
    C. 19,229
    Explanation
    There are 19,229 known Near-Earth Objects (NEOs). This refers to asteroids and comets that come within 1.3 astronomical units of the Earth's orbit. These objects are closely monitored by scientists to track their trajectories and assess any potential risks of collision with our planet. The number constantly changes as new NEOs are discovered and existing ones are tracked more accurately.

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  • 4. 

    As of November 25, 2018, comets make up how many percent of the NEOs?

    • A.

      7.3%

    • B.

      46.9%

    • C.

      0.6%

    • D.

      0.56%

    Correct Answer
    C. 0.6%
    Explanation
    Comets make up 0.6% of the NEOs as of November 25, 2018.

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  • 5. 

    Atens make up how many per cent?

    • A.

      7.3%

    • B.

      42.2%

    • C.

      0.75%

    • D.

      7.39%

    Correct Answer
    A. 7.3%
    Explanation
    The correct answer is 7.3%. This means that Atens make up 7.3% of something, although the question does not provide enough context to determine what that something is.

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  • 6. 

    Apollos are of how many per cent? 

    • A.

      0.89%

    • B.

      5.5%

    • C.

      49.7%

    • D.

      27.9%

    Correct Answer
    C. 49.7%
    Explanation
    The given question asks about the percentage of Apollos. Among the given options, 49.7% is the correct answer.

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  • 7. 

    Amors make up how many percent?

    • A.

      42.2%

    • B.

      41.97%

    • C.

      19.92%

    • D.

      0.63%

    Correct Answer
    A. 42.2%
    Explanation
    The correct answer is 42.2%. This means that 42.2% of something, which is not specified in the question, is made up of amors.

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  • 8. 

    Which of the following is a result of asteroids hitting water bodies? 

    • A.

      Tsunamis 

    • B.

      Flood

    • C.

      Landslide

    • D.

      Vulcanoes

    Correct Answer
    A. Tsunamis 
    Explanation
    Asteroids hitting water bodies can cause tsunamis. When an asteroid collides with a body of water, it creates a large displacement of water, resulting in the formation of massive waves. These waves can travel across the ocean at high speeds and cause widespread destruction when they reach the coastlines, resulting in tsunamis.

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  • 9. 

    As of January 6, 2019, how many PHAs exist?

    • A.

      1,955

    • B.

      1,893

    • C.

      2,597

    • D.

      1,981

    Correct Answer
    A. 1,955
  • 10. 

    As of March 15, 2017, how many NEAs were known to have at least one moon?

    • A.

      59

    • B.

      37

    • C.

      66

    • D.

      72

    Correct Answer
    C. 66
    Explanation
    As of March 15, 2017, there were 66 near-Earth asteroids (NEAs) known to have at least one moon.

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  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Apr 27, 2019
    Quiz Created by
    AdewumiKoju
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