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Blood Spatter

Back to Unit
Essential Question: 
How do investigators identify different types of blood spatter?

​Learning Objective: 
I can design experiments to prove the behavior of liquids under varying velocities.

Standards addressed: 
HS-PS2-1. Analyze data to support the claim that Newton’s second law of motion describes the mathematical relationship among the net force on a macroscopic object, its mass, and its acceleration.
HS-PS2-3 Apply science and engineering ideas to design, evaluate, and refine a device that minimizes the force on a macroscopic object during a collision.*

In Class Sequence


Lesson 1 (Engage)
  • Watch Introductory Video (Graphic: contains crime scene footage)
  • While watching, generate a list of questions to explore
  • Refine list of questions to focus on those which will help with the learning objective
  • Divide questions among group members, and begin investigation

Lesson 2 (Explore)
  • Collaborative Slide deck: Each student will research and answer their chosen question. Please follow the directions on slide 2.
  • When you have completed your slide, contribute one comment and one question to each of two student's other slides using the comment function.

Lesson 3 (Explain)
  • Bloodstain Pattern Analysis Lab
Lesson 4 (Extend)
  • Create a "Blood Spatter Analysis Guide" - one page, containing how to determine velocity (low, medium, or high) and angle of incidence, and identify different types of blood patterns
​
Lesson 5 (Evaluate)
  • Design an Experiment
Picture
Photo Credit

Additional Resources

Reading Material:
  • How Stuff Works Bloodstain Analysis

Videos:
  • ​Blood Spatter 101

Practice: 

Interactives:

​Hands-on:
  • Several hands-on activities- please use caution and parent supervision when handling sharp objects

​Just for Fun:

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  • Home
  • Meet the Teacher
  • Chemistry
    • Chemistry Calendar
    • It's Elemental >
      • Periodic Table
      • Radiation
      • Nuclear Energy
    • The Bonds We Share >
      • Physical or Chemical?
      • Compounds
      • Be Trendy
    • Don't OverREACT >
      • Chemical Equations
      • Types of Reactions
      • Don't Drop the Base
    • Mass in Chemistry >
      • I have this weird Mole
      • Stoichiometry
      • I have the Solution!
    • Energy in Chemistry >
      • Intermolecular Forces
      • Heat in Reactions
      • Enthalpy
    • I Only Eat Organic >
      • Hydrocarbons
      • Biomolecules
      • Circle of Life
    • Final
  • Integrated Science II
    • Matter and Energy >
      • Matter and Its Properties
      • Energy and Matter
    • Heat and Energy >
      • Behavior of Matter
      • Behavior of Energy
      • Earth's Interior
    • Properties of Matter
    • Chemical Attractions
    • Energy In Reactions
    • Human Impact on the Atmosphere
    • Chemical Equilibrium