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In this activity, learners examine fingerprints. Learners leave a hidden print on a surface and then make their own print detecting powder from graphite (found in pencils).

Learners are given mysterious white powders and have to determine their identity with chemical tests.

In this hands-on activity (on page 2 of the PDF), learners experiment with lemon juice and paper to create a message that can only be revealed using chemistry.

In this activity, learners examine their fingerprints and learn that they can be categorized by shape, but each fingerprint is unique.

Learners write an invisible message using lemon juice on a piece of paper. They then develop the message by soaking the paper in a dilute iodine solution.

In this chemistry challenge, learners work to figure out which of four juices are real, and which is just food coloring and sugar.

In this activity, learners write a secret message in "invisible ink" and then use chemistry to view the writing.

In this chemistry activity (page 6 of the PDF), learners observe a chemical change. Learners write and reveal a secret message using edible ink.

In this forensics activity, students will explore the methods that investigators use to confirm the authenticity of handwriting.

Learners observe different paper samples under ordinary room light and under a black light to learn some of the chemical differences between different types of paper.