Question

According to the nebular hypothesis, which of the following is true?

The nebula expanded outward.

Gas and dust flattened into a disk shape.

The sun used up all the gases in the nebula.

The planets were created by the solar wind.

Answer 1

The outer planets are made up of gases that were left over after the sun formed, so the sun didn't use it all up.
If you're asking about the formation of our solar system, the gas and dust flattened into a disk. The planets are made up of the outer stuff of the disk.

Answer 2

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