Engage your students with this NO PREP, real-world science WHODUNNIT investigation focused on condensation and phase changes.

In this structured investigation, students examine real-world conditions, analyze data tables, evaluate temperature and humidity changes, eliminate possible causes, and construct a scientific explanation to determine what caused the classroom windows to become foggy.

"On Monday morning, students arriving at school noticed something unusual inside their classroom. The large windows along the back wall were covered in small water droplets. Just a few days earlier, the windows had been clear and dry." Your students must use clues and evidence to determine - Who or what is responsible for the foggy classroom windows.

Rather than passively learning about condensation and the water cycle, students actively interpret evidence, recognize patterns, and apply scientific reasoning to understand how water vapor changes into liquid—and why certain conditions cause condensation to form. This activity makes science concepts meaningful while building critical thinking, collaboration, and writing skills.

✅ NO PREP, ready to use

No materials, no setup, no stress. Just print or assign digitally and go. Everything students need is included—from the reading to the final CER response.

What Students Will Learn

• How condensation is a physical change
• How water vapor changes into liquid water
• Why cooling is required for condensation to occur
• How temperature differences between air and surfaces cause condensation
• How humidity (water vapor in the air) affects condensation
• How warm, moist air interacts with cooler surfaces
• How thermal energy is lost during phase changes
• How environmental conditions influence phase changes
• How to analyze real-world data to identify cause-and-effect relationships
• How to use Claim–Evidence–Reasoning (CER) to explain scientific phenomena

This activity combines chemistry, real-world problem solving, data analysis, and scientific writing into one structured investigation that keeps students actively engaged from start to finish.

What’s Included

• A complete student investigation with reading, data tables, and guided questions
• A structured suspect elimination process to support logical reasoning
• A collaborative group role system to increase participation and accountability
• A full teacher answer key with completed tables and CER sample responses
• Extension activities for deeper learning and real-world connections

Why Teachers Love This Resource

• Fully structured and print-and-go – no prep required
• High student engagement through real-world problem solving
• Builds critical thinking and data analysis skills
• Strengthens CER writing and scientific explanation
• Encourages meaningful collaboration and discussion
• Flexible for different classroom formats and pacing

Time Required

• 1 class period (45–60 minutes)
• Can be extended into a 2-day investigation with discussion and extension activities

Google Classroom and Distance Learning Ready

• This resource is perfect for in-class or distance learning and integrates seamlessly with Google Classroom.
• It automatically creates a copy of the reading and places it directly into your Google Drive with a single click.
• Purchase → Open → Click → Assign to your students
• The reading also includes a Microsoft Word and PDF version.
• Having all three options allows you to assign the activity without worrying about formatting issues, and ensures access for all students regardless of device or learning environment.

No prep, no formatting, no issues. Simply download, print (or upload), and you're all set.

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If you have any questions please feel free to send me an email - devon@teachwithfergy.com