What is the importance of the observation that the observed amount of normal matter in the universe matches the amount predicted by Big Bang nucleosynthesis?
A) It shows that dark matter cannot be made up of primarily normal matter, such as protons and neutrons.
B) It shows that dark matter is made up primarily of normal matter, such as protons and neutrons.
C) It shows that there is no need to require dark matter in our understanding of the large-scale structure of the universe.
D) It shows that dark matter is made up primarily of neutrinos.

Question

Quizplus · Accepted Answer

The observation that the amount of normal matter matches predictions from Big Bang nucleosynthesis supports the idea that dark matter must be something other than normal, baryonic matter (such as protons and neutrons). This is because the amount of normal matter observed is insufficient to account for the total mass and gravitational effects observed in the universe, indicating that dark matter must be composed of something else.

What Is the Importance of the Observation That the Observed