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

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
A
Community Contributor
Quizzes Created: 810 | Total Attempts: 967,803
Questions: 10 | Attempts: 198

Settings

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.

• 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

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.

Rate this question:

• 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

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.

Rate this question:

• 3.

### There are how many known NEOs?

• A.

19,220

• B.

19,000

• C.

19,229

• D.

18,589

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.

Rate this question:

• 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%

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

Rate this question:

• 5.

### Atens make up how many per cent?

• A.

7.3%

• B.

42.2%

• C.

0.75%

• D.

7.39%

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.

Rate this question:

• 6.

### Apollos are of how many per cent?

• A.

0.89%

• B.

5.5%

• C.

49.7%

• D.

27.9%

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

Rate this question:

• 7.

### Amors make up how many percent?

• A.

42.2%

• B.

41.97%

• C.

19.92%

• D.

0.63%

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.

Rate this question:

• 8.

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

• A.

Tsunamis

• B.

Flood

• C.

Landslide

• D.

Vulcanoes

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.

Rate this question:

• 9.

• A.

1,955

• B.

1,893

• C.

2,597

• D.

1,981

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

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

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

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