Detective science activities for kids - homeschool reading club's mystery reading pack theme3/28/2017
Here's some exciting Detective Science Activities for kids from sciencing.com... Ink Chromatology Ink chromatology means that you separate the dyes used in a pen and determine if a writing sample came from that particular pen. A detective might use this if someone illegally changed the dollar amount written on a check or wrote a ransom note. To conduct a chromatology experiment, you will need two different pens.Use two paper towels or coffee filter strips about 1-inch wide. Draw a dot on each paper with the pens. Make note of which pen you used for each paper. Place the paper in a cup of water with the dot just above the water line. As the water soaks up through the paper, you will see a distinctive pattern for each pen. Witness ExperimentSometimes two witnesses will have two different accounts or descriptions of a suspect because the crime or accident happens so quickly. Try this experiment to see who passes as a reliable witness. Cut out faces from a magazine or print out pictures on the Internet. Try to find pictures of the same size. Cut out the features and rearrange them to make a different face. Show the face to your witness. Scramble the features with the other picture pieces and ask your witness to put the face back together using the correct features. Ballooning FingerprintsDetectives identify some suspects by fingerprints lifted at a crime scene. With this experiment, you will study your own prints. Press one finger firmly on an ink pad, then press it carefully on a flat balloon. Do not smear the ink. When it dries, repeat with your other fingers. Blow up the balloon slightly and study the prints in detail. Use a magnifying glass, if possible. Try this experiment with a friend or classmate and compare your prints. Each person's prints will have a different pattern. Find Height with FootprintsA footprint found at a crime scene provides an important clue. By measuring the length of the footprint, detectives can calculate the approximate height of the suspect. Try this experiment by measuring an adult first because these calculations do not always work with growing children. Measure a person's height. Next, measure the left foot from the wall to the tip of the big toe. Divide the length of the left foot by the height and multiply that number by 100. If you calculated correctly, you will get about 15. An adult's foot will measure about 15 percent of his height. Now measure someone else's left foot. Multiply the number by 100 and divide the answer by 15. This should give you the person's approximate height. Hardy Boys Detective Handbook - perfect for homeschool reading club's mystery reading theme3/28/2017
From the Foreword:
Police science is one of the youngest and most rapidly growing professions in the United States today. I have revised this handbook for fans of Frank and Joe Hardy who are interested in learning about modern police practices. The first seven chapters, based upon true stories from police files, illustrate how Frank and Joe use the various facets of police technology while tracking down criminals. Further uses of these techniques - fingerprinting, surveillance, and other related skills in the science of criminal investigation - are detailed in the last five chapters. |
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