T-Mobile LTE 11:28 AM courses.apexlearning.com C SUBMIT Question 7 of 10 Multipl
ID: 1489037 • Letter: T
Question
T-Mobile LTE 11:28 AM courses.apexlearning.com C SUBMIT Question 7 of 10 Multiple Choice: Please select the best answer and click "submit." Which two pieces of evidence most directly support the idea that the universe is expanding from one original point? O A. The conversion of matter into energy and the redshift O B. The redshift of light from galaxies and the uniform of light from galaxies distribution of cosmic background radiation O C. The abundance of helium in the universe and the uniform distribution of cosmic background radiation O D The abundance of helium in the universe and the conversion of matter into energyExplanation / Answer
It is true that matter and energy are inter-convertible in accordance with the Einstein mass energy relation. In early universe, matter might be formed from energy. But this does not give evidence about the expanding nature of the universe.
When light waves recedes from an observatory point, its spectrum is red shifted. The red shifts of galaxies show that the galaxies are moving away from us.
The combinations of the two do not give evidence that the universe is expanding.
Thus, option (A) is not correct.
The uniform distribution of cosmic background radiation suggests that there are many electromagnetic waves still coming from some unknown sources. These radiation are distributed uniformly suggest that they can be the left over radiation when big bang happened at the early universe and still spreading all over the universe.
With the red shift of the galaxies, the uniform distribution of cosmic background radiation clearly indicates that the universe is expanding.
Thus, option (B) is correct.
Hydrogen is the most abundant gas in the universe. Helium is next to Hydrogen. But the abundant of helium in the universe does not give any evidence about the expanding nature of universe.
Thus, option (C) and is not correct.
The abundant of helium in the universe and the conversion of matter inot energy do not give any evidence about the expanding nature of universe.
Thus, option (D) is not correct.
Therefore, option (B) is correct.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.