Practice Quiz

Praxis II General Science

Category - Physics

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Black holes occur when a star is no longer able to support the fusion occurring in its core. If the sun became a black hole, what would happen to the Earth’s orbit?
  1. Earth would fly off into the unknown.
  2. Earth would maintain its present orbit.
  3. Earth would be destroyed, so it would no longer orbit.
  4. Earth’s orbit would become much like Pluto’s.
  5. Earth would be pulled into the sun.
Explanation
Answer: B - Although the sun is now a black hole, its mass would remain the same, or similar. Thus, its gravitational attraction would also be the same, meaning Earth’s orbit should not change.
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