Cell Theory

Inside the case file

Build life science knowledge through a case worth solving. This printable Cell Theory Science Mystery turns a nonfiction science passage on Cell Theory and plant and animal cells into a science-detective investigation for Grades 5–8 science teachers, homeschoolers, and tutors. It drops straight into a life science or cells unit and makes close reading the whole point.

Careful reading is the key — each text-based answer knocks a suspect off the list until only the culprit stands. Nothing to prep or laminate.

Quick Details

Grade Levels: Grades 5–8
Format: Printable PDF
Resource Type: Science Mystery worksheets
Reading Skills: Nonfiction science comprehension, text evidence, main idea, cause and effect, and science vocabulary
Science Standards: Supports NGSS MS-LS1-1 and MS-LS1-2
Tech Needed: None — no apps, locks, passwords, or student logins required

The Case

A life science mystery is waiting under the microscope, and a line-up of suspects stands ready. The only way to crack the case is to read closely about Cell Theory — its discovery, plant and animal cells, and the idea that all living things are made of cells — using every comprehension answer as a clue to rule a suspect out, until just one remains.

How the Science Mystery Works

Students work as Science Detectives, reading about Cell Theory and clearing a suspect with each text-based answer until the culprit is all that's left. The answers are all in the passage.

What's Included

• A "You are a detective" case-file page that sets the scene and the mission
• An engaging informational passage on Cell Theory and living organisms (its development, key discoveries, and plant and animal cells)
• Multiple-choice comprehension questions (all answers found in the text)
• Open-ended written response questions
• A suspect line-up page for eliminating suspects one clue at a time
• A cell-themed vocabulary word search and extension activities for early finishers
• A full answer key
• Color and black-and-white versions
• Print-and-go PDF format

Skills Covered

• Reading and understanding nonfiction science text
• Finding and using text evidence
• Cell Theory and the idea that all living things are made of cells
• Comparing plant and animal cells
• Cause and effect and drawing conclusions from evidence
• Science vocabulary in context
• Logic, reasoning, and critical thinking

Best Used For

• Life science and cells units and review
• NGSS-aligned review and inquiry lessons
• Science and nonfiction reading comprehension
• Science centers, test prep, sub plans, and small groups
• Homeschool science