In this lesson, you learned about Nebular Theory, Angular Momentum, and Capture Theory. Now you're going to review scientific claims and write a Claims-Evidence-Reasoning paragraph with your findings.

First, review the CER Paragraph Structure below before continuing.

• Claim: State which claim (A, B, or C) is the most scientifically accurate.
• Evidence: Use 2-3 facts from your lesson or reliable sources to support your choice (e.g., role of hydrogen, gravity, fusion).
• Reasoning: Explain why your evidence supports the claim and why the others are incorrect or misleading.

Now, review the three scientific claims related to the formation of stars and solar systems. Evaluate each claim, select the one you find most accurate, and defend your choice using the Claim-Evidence-Reasoning (CER) model.

• Claim A: A star begins forming when a planet gets hot enough to start burning gases.
• Claim B: Solar systems form when a nebula collapses under gravity, creating a spinning disk.
• Claim C: Hydrogen is important but not common; other elements are more useful in forming stars.

Scoring Guide:

• 4 points: Response includes which claim is the most scientifically accurate (Claim).
• 6 total points (3 points/fact): Response includes 2-3 facts from the lesson or reliable sources to support the choice (e.g., role of hydrogen, gravity, fusion) (Evidence).
• 5 points: Response explains why your evidence supports the claim and why the others are incorrect or misleading (Reasoning).
• 3 points: Response includes properly cited source(s)