Under the microscope

Under the microscope

The human body contains over 10,000 different bacteria. The majority of them are beneficial to our bodily functions and day-to-day lifestyles, however that is not always the case. In this lesson, students will learn about the classification of bacteria, as well as the effects of a range of good and bad bacteria and pathogens. Students will then be challenged to conduct observations and analysis of S. lactis bacteria before reproducing them as 3D models for printing. 
Subjects
BiologyDesign and TechnologyScienceMathematicsComputingMasaryk University
Years | Grades
8th Grade | 12-13 years9th Grade | 13-14 years10th Grade | 14-15 years
Duration
Lesson 1: 60 minutes Lesson 2: 60 minutes Print time: 2 hours 30 minutes

Under the microscope trailer
Play 0:44

Objectives

  • Design and measure with precision 

  • Demonstrate how to align objects 

  • Employ tolerances and offsets 

  • Understand and execute boolean operation in CAD 

  • Understand and practice bacterial modelling 

  • Correctly identify and classify bacteria  

  • Define the meaning of the word “Pathogenic” 

 

Tools and equipment

  • Graph paper and pencils 

  • Microscope 

  • Streptococcus Lactis slides (S. lactis) 
    OR 

  • Resource images of S. lactis 

 

Skill requirements

To participate in the lesson, students should be able to: 
  • Use TinkerCAD, Fusion 360 or similar CAD software at a beginner level 

  • Be comfortable using DeeControl software including adjusting print settings 

  • Use the BE3D eDee 3D printer 

Under the microscope walkthrough
Play 2:14

3D models overview

  • Total print time 22 hours
  • Total filament 40.5 m
  • Additional non-printable components
  • Printed all at once
Cocci full (component)
  • 40 minutes
  • 0.6 m
Cocci shortened (component)
  • 30 minutes
  • 0.5 m
Diplococci (component)
  • 50 minutes
  • 0.8 m
Streptococcus (component example)
  • 2 hours
  • 4.5 m
Bacillus
  • 1 hour 15 minutes
  • 1.3 m
Coccobacillus
  • 20 minutes
  • 0.2 m
Diplobacilli
  • 1 hour 30 minutes
  • 2.6 m
Diplococci
  • 1 hour
  • 1 m
Palisades
  • 3 hours
  • 7.7 m
Sarcina
  • 2 hours 45 minutes
  • 4.6 m
Spirilla
  • 50 minutes
  • 0.7 m
Spirochaetes
  • 20 minutes
  • 0.3 m
Staphylococci
  • 3 hours
  • 7.3 m
Streptobacilli
  • 2 hours
  • 5 m
Tetrad
  • 1 hour 30 minutes
  • 2.4 m
Vibrio
  • 40 minutes
  • 1 m
Note: Values are calculated for one set of models.

Lesson resources

  • Lesson plan 

  • Example models 

  • Worksheet 

  • Walkthrough 

  • Presentation 

  • 3D models 

  • 3D print instructions 

  • Curriculum alignment