States of Matter

Inside the case file

Solid, liquid, gas — and something just changed from one to another. What happened? This printable States of Matter Reading Mystery turns solids, liquids, and gases into a reading-detective case for Grades 3–6, fitting into any matter, properties of materials, or physical-science unit.

Reading is the whole game here: students use text evidence to cross off suspects until the culprit is cornered. No apps, no laminating, no prep.

Quick Details

Grade Levels: Grades 3–6 (best for Grades 3–5)
Format: Printable PDF
Resource Type: Reading Mystery worksheets
Reading Skills: Nonfiction comprehension, text evidence, main idea, compare and contrast, and inference
Best For: Science reading, reading centers, sub plans, early finishers, review, small groups, and homeschool
Tech Needed: None — no apps, locks, passwords, or student logins required

The Case

A puzzling change has taken place, and a line-up of suspects is waiting. The only way to crack the case is to read closely about the states of matter — solids, liquids, and gases, and how they change from one to another — using every comprehension answer as a clue to rule a suspect out, until just one remains.

How the Reading Mystery Works

Students take on the role of Reading Detectives, reading about the states of matter and eliminating a suspect with each text-based answer until one is left standing. There's no guessing — only the text.

What's Included

• An engaging nonfiction reading passage on the states of matter (solids, liquids, and gases, particle behaviour, and changes of state such as melting, freezing, and evaporation)
• Multiple-choice comprehension questions
• Open-ended comprehension questions
• A case-file scenario and suspect elimination line-up
• Vocabulary support for early finishers
• Answer keys for all activities
• Color and black-and-white versions
• Print-and-go PDF format

Skills Covered

• Reading and understanding nonfiction informational text
• Finding and using text evidence
• Identifying main idea and supporting details
• Compare and contrast, cause and effect, and inference
• Science vocabulary in context
• Logic, reasoning, and critical thinking

Best Used For

• Matter, properties of materials, and physical-science units
• Nonfiction reading comprehension practice
• Reading centers and early finishers
• Substitute teacher plans
• Small groups, RTI, and intervention
• Homeschool reading and science