Air Masses, Fronts & Storms CER | Weather Science Writing Activity

Help students connect air masses, weather fronts, rising air, and thunderstorm development with this ready-to-use Claim, Evidence, and Reasoning activity!

In Can Fronts Create Storms, students analyze a weather scenario involving an approaching cold front. They must determine which student's explanation is better supported by scientific evidence and construct a complete CER response explaining how interacting air masses and weather fronts can contribute to thunderstorm development.

Students are encouraged to use evidence from their notes, presentations, weather map activities, investigations, and other unit learning. The activity includes space to brainstorm before writing, a structured CER response page, a simple 20-point grading rubric, and a complete teacher sample response.

This resource works well as an end-of-lesson assessment, unit review, science writing assignment, formative assessment, or CER practice activity during a middle school weather unit.

What's Included

5-page PDF resource:

• CER Prompt & Brainstorm Page

  • Realistic cold-front weather scenario

  • Student task/question

  • Success criteria

  • Suggested evidence sources

  • Brainstorming space

• Science Information Reference Sheet

• CER Response Page

  • Claim section

  • Evidence section

  • Reasoning section

• 20-Point Teacher Grading Rubric

  • Clear claim

  • 3 accurate and relevant pieces of evidence

  • Reasoning

  • Science vocabulary

  • Writing conventions

• Teacher Answer Key / Sample Response

  • Sample claim

  • Sample evidence

  • Sample reasoning

  • Teacher notes

  • Expected cause-and-effect chain

Students Will Practice

• Writing a clear scientific claim

• Selecting relevant evidence

• Explaining how evidence supports a claim through reasoning

• Using weather vocabulary accurately

• Explaining interactions between air masses and fronts

• Connecting lift, rising air, cooling, condensation, and cumulonimbus cloud formation

• Explaining how weather fronts can contribute to thunderstorm development

• Constructing scientific explanations using cause-and-effect relationships