Blood Spatter: How to Make Spatter

Heidi Hisrich

26 Jun 202003:25

Summary

TLDRThis educational video demonstrates a blood spatter experiment using PPE, including safety glasses, lab coats, and covered shoes. The process involves taping paper to prevent movement, creating blood spatter with 'vampire blood' and a pipette, and collecting data by dropping at various heights. One partner drops the blood while the other records the results. The video guides viewers on how to properly mark and measure the spatter, and suggests letting it dry before analysis. For those unable to perform the experiment, a link to a Google Doc with pre-collected data is provided. The video concludes with a teaser for the next part, which will cover measurement, graphing, and interpretation of blood spatter.

Takeaways

👓 The video discusses Personal Protective Equipment (PPE), including safety glasses, lab coats, and toe-covered shoes.
🔬 They use paper taped down to prevent it from moving during the experiment.
🧪 'Vampire blood' is mentioned as a substance for creating blood spatter in the experiment.
💧 A container and pipette are used to create droplets for the blood spatter.
📏 The height of the droplets is measured using a meter stick.
🔍 One partner is responsible for creating the droplets while the other records the data.
📝 There is a focus on achieving good, non-overlapping droplets for accurate data collection.
🎯 The script mentions the importance of marking and recording the height of the droplets accurately.
⏱️ The blood spatter needs to dry for a few hours or overnight before measurements are taken.
🔗 A Google Doc link is provided in the video description for those who cannot perform the experiment, containing real blood spatter data.
📈 The video series will continue with instructions on how to measure, graph, and interpret the blood spatter data in a subsequent video.

Q & A

What personal protective equipment (PPE) is mentioned in the script?
-The PPE mentioned includes safety glasses, lab coats, and toe-covered shoes.
Why is paper taped down in the experiment?
-The paper is taped down to prevent it from blowing away during the blood spatter experiment.
What is used to simulate blood for the blood spatter experiment?
-Vampire blood is used to simulate real blood for the blood spatter experiment.
What tools are used to create the blood droplets?
-A container and a pipette are used to create the blood droplets for the experiment.
What is the initial height at which the blood droplets are dropped in the experiment?
-The initial height at which the blood droplets are dropped is 20 centimeters.
Why is it important to avoid getting blood on the meter stick?
-It is important to avoid getting blood on the meter stick to ensure accurate measurements and to prevent contamination of the experiment.
What is the process for marking and recording the blood spatter on the paper?
-One partner drops the blood while the other records the height and marks the paper where the droplets land.
Why is it necessary to let the blood spatter dry before measuring?
-The blood spatter needs to dry before measuring to ensure accurate measurements and to prevent smudging or distortion of the spatter pattern.
How long is recommended for the blood spatter to dry?
-It is recommended to let the blood spatter dry for at least a few hours, or overnight for best results.
What resource is provided for those who cannot perform the blood spatter experiment themselves?
-A link to a Google Doc with pre-recorded blood spatter data is provided for those who cannot perform the experiment.
What will the next video cover after this one?
-The next video will explain how to measure, graph, and interpret the blood spatter data.

Outlines

00:00

🔬 Blood Spatter Experiment Setup

The video script describes a procedure for a blood spatter experiment, emphasizing the importance of personal protective equipment (PPE) such as safety glasses, lab coats, and covered shoes. Participants are instructed to secure paper to prevent movement and use a substance referred to as 'vampire blood' to simulate blood for the experiment. A container and pipette are utilized to create droplets of the substance. The process involves one partner dropping the substance from a specific height while the other records the results on paper. The script details the technique of dropping the substance without it touching the pipette and ensuring clear, non-overlapping droplets for accurate data collection. The height of the drops is recorded, and the paper is marked accordingly. The video concludes with a reminder to allow the blood spatter to dry before measurement and offers an alternative for those unable to conduct the experiment by providing a link to a Google Doc with pre-recorded blood spatter data.

Mindmap

Keywords

💡PPE

Personal Protective Equipment (PPE) refers to the equipment or clothing designed to protect the wearer from injury or infection. In the context of the video, PPE includes safety glasses, lab coats, and toe-covered shoes. These are essential for conducting experiments safely, especially when dealing with substances like 'vampire blood' which is used to simulate blood spatter in the lab.

💡Safety Glasses

Safety glasses are a type of protective eyewear designed to protect the eyes from flying debris, chemicals, or other hazards. In the video, safety glasses are mentioned as part of the PPE to be worn during the blood spatter experiment, highlighting the importance of eye protection when conducting scientific experiments.

💡Lab Coat

A lab coat is a protective garment worn in laboratories to protect the wearer's clothing from chemicals, dust, and other contaminants. In the video, lab coats are part of the PPE, ensuring that the participants are protected from any potential splashes or spills during the blood spatter experiment.

💡Toe-Covered Shoes

Toe-covered shoes, often referred to as safety shoes or boots, are designed to protect the wearer's feet and toes from injury. In the script, these are included in the PPE to safeguard against any accidents that could occur during the experiment, such as dropping objects or spills.

💡Vampire Blood

In the context of the video, 'vampire blood' is a simulated blood substitute used for educational purposes, such as creating blood spatter patterns in a controlled lab environment. It is not actual blood but a substance that mimics its appearance and behavior for the purpose of the experiment.

💡Blood Spatter

Blood spatter refers to the pattern created when blood is forcefully ejected or dispersed onto a surface. In the video, the participants are conducting an experiment to collect and analyze blood spatter patterns using 'vampire blood'. This is a key concept in forensic science, often used to determine the trajectory and impact of a violent event.

💡Container and Pipette

A container and pipette are laboratory tools used for handling and measuring liquids. In the video, these tools are used to collect and dispense 'vampire blood' to create blood spatter. The pipette is particularly important for controlling the amount of liquid used in each droplet, ensuring consistency in the experiment.

💡Droplets

In the context of the video, droplets refer to the individual instances of blood spatter created by dripping 'vampire blood' from a pipette. The size, shape, and distribution of these droplets are crucial for analyzing the blood spatter pattern and can provide insights into the dynamics of the event that created them.

💡Height

Height, in this video, refers to the vertical distance from which the blood droplets are released. The participants are experimenting with different heights (20mm and 40mm) to observe how this variable affects the blood spatter pattern. This is an important factor in forensic analysis, as it can help reconstruct the scene of a crime.

💡Measurement

Measurement is the process of determining the size, amount, or degree of something. In the video, after the blood spatter has dried, the participants will measure the spatter patterns. This is a critical step in the experiment, as accurate measurements are necessary for analyzing and interpreting the data collected.

💡Data Collection

Data collection is the process of gathering information and recording it in an organized manner for analysis. In the script, one partner is responsible for creating the blood droplets while the other records the data, such as the height and the quality of the droplets. This collaborative approach ensures that the data is systematically collected and can be used for further analysis.

💡Graphing

Graphing is a method of displaying data in a visual format, often used to identify patterns or trends. The video mentions that the participants will graph the blood spatter data, which is a common practice in scientific research to better understand the relationships between variables and to interpret the results of an experiment.

Highlights

Introduction of Personal Protective Equipment (PPE) including safety glasses, lab coats, and toe-covered shoes.

Use of paper taping to prevent movement during the experiment.

Innovative use of 'vampire blood' as a substitute for real blood in spatter experiments.

Utilization of a container and pipette for blood spatter droplet collection.

Collaborative data collection process with one partner dropping and the other recording.

Methodology of holding the pipette near the meter stick without contaminating it.

Procedure for collecting blood spatter droplets at specific heights.

Important note on avoiding air bubbles in the blood spatter droplets.

Marking the paper with successful droplet heights and recording the data.

Instruction on how to label and mark the blood spatter for analysis.

Recommendation to let the blood spatter dry for accurate measurement.

Suggestion to dry the spatter overnight for best results.

Provision of a Google Doc link for those unable to perform the experiment themselves.

Offering a second video tutorial on how to measure, graph, and interpret blood spatter.

Completion of the blood spatter collection with 20 labeled droplets.

Encouragement for viewers to watch the next video for further analysis instructions.