Birth of the Sun
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Questions and Answers

How long ago was the sun born as a star in a nebula?

  • 2.3 billion years ago
  • 4.6 billion years ago (correct)
  • 7.9 billion years ago
  • 10.2 billion years ago

What is the sun's importance to life on Earth?

  • It is a precious gem in the sky
  • It is the source of energy for life on Earth (correct)
  • It is the only source of light during the day
  • It is the largest star in the universe

What was the common belief about the sun in ancient times?

  • It was made of ice
  • It was a solid object
  • It was a liquid ball
  • It was a burning ball of fire created by the gods (correct)

How many Earths could fit inside the sun?

<p>Over one million Earths (D)</p> Signup and view all the answers

What kind of cloud did the sun originate from before it was born as a star?

<p>Nebula (C)</p> Signup and view all the answers

What process takes place in the sun's core that allows it to be classified as a main-sequence star?

<p>Nuclear fusion (C)</p> Signup and view all the answers

What will happen to Earth in about a billion years due to the sun's increasing energy levels?

<p>Extreme greenhouse effect leading to water evaporation (C)</p> Signup and view all the answers

What will be the fate of Venus and Mercury when the sun reaches its red giant phase?

<p>They will be engulfed by the expanding sun (B)</p> Signup and view all the answers

What is the end result of the sun's transformation during its red giant phase?

<p>It collapses into a white dwarf (B)</p> Signup and view all the answers

What is the fate of the white dwarf as it cools down over time?

<p>It will cool down until it reaches a few degrees above absolute zero (B)</p> Signup and view all the answers

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