CourseCourseConceptConceptDocsDocuments

IB Physics SL E 5 2 Fusion in Stars Questions

Identify SL fusion stages in stars by relating core composition, stellar evolution and the elements being fused at different stages.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • identify hydrogen-to-helium fusion in main-sequence stars and determine which element is fusing at a stated evolutionary stage
  • use core and outer-layer composition evidence to distinguish main-sequence and evolved stars
  • relate observed stellar composition to the stage of stellar evolution and the fuel available for fusion

Learn this topic

Study E.5.2—Fusion in stars conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Physics SL E 5 2 Fusion in Stars Questions question 1

[Maximum number: 1]

Three stars A, B and C are labelled on the Hertzsprung-Russell (HR) diagram. L⊙L_{\odot} is the Luminosity of the sun.

Figure for Question IB Physics SL E 5 2 Fusion in Stars Questions question 1 — IB Physics SL

State the main element that is undergoing nuclear fusion in star C .

All question bank results loaded