Jennifer Buckler Pekkala

Subject: Science

Lesson Title: How to Make Invisible Ink

Grade Level: 1^st Grade

Materials Needed:

• Lemon Juice
• 100 watt light bulb or other heat source
• Paper
• Cotton Swabs or Paintbrushes

Instructional Objective:

Activity:

1. Use lemon juice as “ink” by applying it to a cotton swab or paintbrush and writing a secret message on a piece of paper.
2. Allow the paper to dry completely.
3. When you are ready to read your invisible message, hold the paper up to a light bulb or other heat source.
4. The heat will cause the writing to darken to a pale brown, so your message can now be read.

Accommodations – At risk:

This is a hands-on activity that may be completed by students at any academic level. A teacher will be present while the experiment is taking place to help this student in any way necessary.

Accommodations – High Achievers:

Have other types of juice available for these students to experiment with. (Orange juice, vinegar, apple juice, etc…) Have them use these juices and report what type of reaction took place.