Observations of galaxies and clusters of galaxies indicate that about ___________ percent of the matter in the universe is dark matter.
A)5
B)25
C)35
D)45
E)90

Name: Observations of galaxies and clusters of galaxies indicate that about ___________ percent of the matter in the universe is dark matter. A)5 B)25 C)35 D)45 E)90
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Dark matter is a hypothetical type of matter that is thought to account for approximately 90% of the matter in the universe.

Observations of Galaxies and Clusters of Galaxies Indicate That About