Fingerprinting Techniques and Concepts

In this video, Samina, a science teacher, introduces the concept of fingerprinting, a technique used by forensic scientists. The video includes two activities: lifting fingerprints using paper and pencil, and lifting fingerprints from glass using cornstarch. Samina explains the materials needed and the steps for each activity. The video also discusses the uniqueness of fingerprints and encourages viewers to share their results on social media.

What materials are needed for the first fingerprinting activity?

• A glass cup, cornstarch, a small bowl, and a paintbrush

• A magnifying lens, a phone camera, and a piece of black construction paper

• A ruler, a marker, and a piece of cardboard

• A blank piece of paper, a sharpened pencil, clear tape, and a pair of scissors

What is the purpose of drawing an oval with a pencil in the first activity?

• To practice drawing shapes

• To use it as a guide for cutting the paper

• To use it for capturing the fingerprint

• To create a design on the paper

Which of the following is NOT a category of fingerprint patterns?

• Spiral

• Whirl

• Loop

• Arch

What is the first step in lifting fingerprints from glass?

• Washing the glass thoroughly

• Applying ink to the glass

• Rubbing your finger on your nose or forehead

• Heating the glass

Why is cornstarch used in the second activity?

• To clean the glass

• To make the fingerprint visible

• To color the fingerprint

• To stick the tape to the glass

What should you do if there is too much cornstarch on the brush?

• Wash the brush

• Tap the brush against the edge of the bowl

• Use a different brush

• Add more cornstarch

What is the final step in the second activity to view the fingerprint?

• Press the tape against a dark piece of paper

• Apply more cornstarch

• Wash the glass

• Use a magnifying lens

What makes fingerprints unique?

• They are the same for everyone

• They are only found on fingers

• They change every year

• They are unique to each individual

How can fingerprints be altered?

• By wearing gloves

• By using lotion

• Through an injury

• By washing hands frequently

What is suggested to do with the fingerprint results?

• Use them to unlock devices

• Share them on social media with permission

• Throw them away

• Keep them private