Redshift and Hubble's Law

Overview

Use redshift evidence and Hubble’s law to describe the expanding universe. Use this page for class notes, worked examples, and linked resources.

Key knowledge and explanations

• Main idea: Use redshift evidence and Hubble’s law to describe the expanding universe.
• Key definitions, models, equations, or diagrams to introduce.
• One worked example, demonstration, or observation that makes the idea concrete.

Lesson flow

1. Start with prior knowledge, context, or a short recall task.
2. Work through the main explanation, method, diagram, or calculation for this lesson.
3. Complete guided practice, discussion, calculations, or practical application.
4. Review the learning with an exit prompt, short question, or summary task.

Checks for understanding

• Use a hinge question aligned to the main objective(s) to check your understanding.
• Use a short verbal, written, or numerical response to check for secure understanding.

Common mistakes or misconceptions

• Watch for the likely misconception, error, or weak step in this lesson.
• Review the comparison, model answer, or explanation that will correct it.

Follow-up

• Complete the homework, retrieval task, or resource revisit linked to this lesson.
• Note what you need to carry forward into the next lesson.