Answers 25-26 Dally -- Earth and Space Science 4th 9 Weeks BLDG Unit Test — Unit testQuestion 25

25

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Unit Test — Unit test

Question 25 • (25-26) Dally -- Earth and Space Science 4th 9 Weeks BLDG

What can be observed only by observing its effects on gravity?

Answer

A

dark matter

B

a solar nebula

C

gas and dust

D

a planetesimal

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