MOST of the mass of the universe-98%-is in the form of:
A) hydrogen and helium.
B) nitrogen and oxygen.
C) iron and silicon.
D) hydrogen.

Question

Quizplus · Accepted Answer

According to current astronomical observations, most of the mass in the universe is in the form of hydrogen and helium. These two elements were created during the Big Bang and have been a dominant part of the universe ever since. While other elements may be present in stars and planets, they make up a relatively small portion of the overall mass of the universe. Therefore, choice A (hydrogen and helium) is the best choice.

MOST of the Mass of the Universe-98%-Is in the Form