Dropped at the Scene
Recommended for grades 9–12.
Introduction
Museum curator Jessica Barnes was found dead on 10/05/05, the day before the grand opening of the world famous traveling exhibit Shadows of Egypt. Her body was found at the base of the large marble fountain in the center of the museum lobby.
It was clear that the victim was strangled. A few drops of blood were found on the tile floor, but blood tests show that the blood is not the victim’s. Investigators have found traces of the same blood on the knuckles of the victim’s hand. Investigators are suggesting that she fought her attacker, giving him or her a bloody nose or lip, and that the blood dripped onto the floor as the attacker fled the scene.
Objectives
- Determine the height of a source of blood spatters or drops.
- Graph data to find quantitative relationships.
- Create a standard reference curve for comparison with unknown data.
Sensors and Equipment
No probeware required for this experiment.
Download Experiment Preview
The student-version preview includes:
- Step-by-step instructions for computer-based data collection
- List of materials and equipment
Note: The experiment preview of the computer edition does not include essential teacher information, safety tips, or sample data. Instructions for Logger Pro and other software (such as LabQuest App or TI handheld software, where available) are on the CD that accompanies the book. We strongly recommend that you purchase the book before performing experiments.
Standards Correlations
Included in the Lab Book
Vernier lab books include a CD with word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.