ConceptConceptDocsDocuments

IB Physics SL E.5.5 HR diagram regions Question Bank

Practise IB Physics SL/HL E.5.5 by applying hr diagram regions concepts to exam-style physics questions.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • identify the relevant physical quantity, model or diagram
  • apply the correct equation and units to the evidence
  • justify the result using conservation laws, fields or energy relationships

E.5.5—HR diagram regions question 1

[Maximum number: 1]

The diagram shows a simplified energy-balance model for the Earth surface–atmosphere system.

Figure for Question E.5.5—HR diagram regions question 1 — IB Physics SL

The following data are given:

 Average albedo of Earth =0.30 Average global temperature of the surface =288 K Average Earth-Sun distance =1.5×1011 m\begin{aligned} \text { Average albedo of Earth } & =0.30 \\ \text { Average global temperature of the surface } & =288 \mathrm{~K} \\ \text { Average Earth-Sun distance } & =1.5 \times 10^{11} \mathrm{~m} \end{aligned}

The positions of the Sun and the star Antares are shown in the Hertzsprung-Russell (HR) diagram.

Figure for Question E.5.5—HR diagram regions question 1 — IB Physics SL

State the star type of Antares.

All question bank results loaded