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Earth Systems A

How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.(1 point)

A.The percentage of ordinary matter has grown in scientists' estimates.
B.The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
C.The percentage of dark energy has shrunk in scientists' estimates.
D.The percentage of unknown material has grown in scientists' estimates since the 1970s.

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  1. Does anyone have the answers??? :((

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  2. Here's all the answers :)
    1)How has scientific understanding about the composition of the universe changed over time? Select the two correct answers.
    The percentage of unknown material has grown in scientists' estimates since the 1970s.
    The percentage of dark matter has shrunk in scientists' estimates since the 1980s.
    2) Which is evidence for the existence of dark energy?
    Supernovae that are moving away at an accelerating rate.
    3)How did dark matter affect the development of structures in the early universe?
    It seeded the development of galaxies.

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  3. moon is correct

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  4. MOON IS CORRECT !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!i!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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  5. moon is 100% correct, thanks moon.

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  6. Thank you sonny boy.

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