Praxis 5005 Practice Question
Which TWO of the following statements about the universe are true?
Correct Answer: A
Rationale: The universe is indeed expanding, as evidenced by the redshift of distant galaxies, confirming that they are moving away from us. This expansion is a fundamental aspect of modern cosmology.
Option B is incorrect; while the Milky Way is home to billions of stars, it comprises only a small fraction of the total stars in the universe, which is estimated to contain trillions of galaxies.
Option C is misleading; a star undergoes various changes throughout its life cycle, including shifts in size and temperature as it progresses through different stages.
Option D is also incorrect; black holes do not emit visible light. They are detected by their gravitational effects on nearby objects and the radiation emitted by material falling into them.
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