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Choose True or False for the following statements:


  1. Scientists measure distances in space with astronomical units (AU).
  2. A black hole has so much gravity nothing can escape it except light.
  3. Gravity increases with decreasing distance.
  4. An astronomical unit is the average distance between the sun and Earth.

Verified Answer :

Final answer:

All four statements regarding astronomical units, black holes, gravity, and the definition of an AU are true. Gravitational force increases with decreasing distance, and an AU is specifically the average distance between the Earth and the Sun.


Explanation:

True or False Statements in Astronomy

Let's evaluate the statements one by one:

  1. True: Scientists measure distances in space with astronomical units (AU). An astronomical unit is indeed a standard unit of measurement used to express distances within our solar system, where 1 AU is approximately the distance from the Earth to the Sun.
  2. True: A black hole has so much gravity that nothing can escape it except light. This is accurate; the gravitational pull of a black hole is so intense that even light cannot escape its event horizon.
  3. True: Gravity increases with decreasing distance. This statement reflects Newton's Law of Universal Gravitation, which states that as two masses get closer together, the gravitational force between them increases.
  4. True: An astronomical unit is the average distance between the Sun and Earth. This is the very definition of an AU. Therefore, this statement is also true.

In summary, all four statements are true.


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