6th Grade · Science · Activity · shared by Luke Morgan
Explore microbiology with this 6th Grade Science activity. Students analyze clues to identify a mystery microorganism, inspired by Leeuwenhoek.
Case File: The Microscopic Intruder
Incident Report: A local biologist, inspired by the work of Antonie van Leeuwenhoek, has discovered an unknown microorganism in a sample collected earlier today. The biologist was able to observe its behavior and habitat but could not identify the specific species before their microscope lens cracked. Your team of microbiologists has been called in to analyze the remaining evidence and identify the "Animalcule" in question.
Background Briefing: Review these key facts from Leeuwenhoek’s original findings to help your investigation.
Term
Definition / Significance
Animalcules
The name Leeuwenhoek gave to tiny moving dots he saw in water, meaning "little animals."
Microbiology
The scientific study of organisms too small to see without the help of magnification.
Microorganism Shapes
Common shapes include spheres (round), rods (long and thin), and spirals (corkscrew).
Habitats
Leeuwenhoek found microbes in pond water, rainwater, and even scrapings from teeth.
Phase 1: Clue Discovery
Analyze the three pieces of evidence recovered from the lab notes. Use these clues to narrow down the identity of the mystery microbe.
Clue #1: The Habitat Log
The sample was not taken from a person or from the sky. The notes state: "Collected from a stagnant pool of water near the edge of the village woods. The water contains decaying leaves and green algae."
Clue #2: The Movement Profile
The biologist recorded the following observation: "The creature does not sit still. It uses tiny, hair-like structures to propel itself forward. It moves in a rapid, spiraling motion, darting back and forth across the field of view."
Clue #3: The Shape Sketch Description
The sketch was smudged, but the written description remains: "The body is elongated and twisted, resembling a tiny corkscrew…