Construct a simple wet cell battery. When complete it will generate 1.5 volts for 20-30 minutes. Several cells can be connected in series to increase the voltage or in parallel to increase the current
Owls have a specialized digestive tract which helps them expel the indigestible parts of their prey in pellet form. Dissecting an owl pellet can teach students the concepts of food webs and food chains while identifying the small animals that are prey for the owls. The pellets are heat sterilized and individually wrapped. Kit contains enough materials for 15 groups. Teacher’s Manual and Student Study Guide copymasters are included
How is the water that comes out of our faucets made safe for consumption? Students will learn about the processes performed at water treatment facilities, and then engineer their own small scale filtration plant. Once they design their filtering system, they will observe and evaluate the quality of the water they produce. Kit contains enough materials for 15 groups of students. Teacher’s Manual and Student Study Guide copymasters are included
DNA Paternity Testing Electrophoresis Lab Activity
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While over 99% of DNA is the same among all humans, the remaining part is unique to every individual (with the exception of identical twins). These differences are hereditary, with parts of the unique sequence coming from each parent. By using DNA fingerprinting, or DNA profiling, a child’s paternal relationship can be tested by comparing the child’s DNA profile to the profile of the mother and possible father to determine if an individual is the father or not. In this activity students will use electrophoresis to separate DNA samples of a child, mother, and two potential fathers to determine if either father is a possible paternal match. The kit contains enough materials for 8 groups of students and includes a Teacher’s Guide and Student Study Guide copymasters.
Environmental Chemistry: Water Treatment and Filtration
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Students will develop a knowledge of the processes performed at a water treatment plant and understand the reasons for each process. They will perform, on a small-scale, several of the procedures that occur in a water treatment plant on “polluted” water. They will examine the changes in the water after each treatment step is performed. They will also observe physical characteristics of water, such as clarity, color, odor, and how they are affected from the beginning of the treatment process until the end. Kit contains enough materials for 15 groups of students. Teacher’s Manual and Student Study Guide copymasters are included.
Forensic chemists are responsible for analyzing and identifying unknown substances, such as drugs and narcotics, that are found at a crime scene. In this activity, students will learn how forensic chemists can use simple chemical tests and reactions to help determine the identity of an unknown substance. Students will perform a variety of presumptive tests on an unknown substance along with a series of known controls. By comparing the test results of the unknown with those of the controls, the most likely composition of the unknown will be determined. Teacher’s Manual and Student Study Guide copymasters are included. Kit contains enough materials for 15 groups
Everyone who ate the school cafeteria’s chili became ill. Could someone have tainted the chili? You are a forensic toxicologist. It is you and your classmates’ task to determine if any of the chili ingredients from the cafeteria could have been substituted with aspirin, which appears to have been stolen from the nurse’s office. You will perform a series of chemical tests, including tests on control acetylsalicylic acid, the chemical name of aspirin, in the lab. Kit contains enough material for 15 groups. Teacher’s Manual and Student Study Guide copymasters are included
Forensic Chemistry: Chemical Detection of Fingerprints
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Utilize alternative methods for detecting fingerprints. Examine some possible methods of gathering evidence when dusting for fingerprints is not effective. Learn to identify fingerprint types, a method of fuming for fingerprints, and a technique of chemically-developing fingerprints. The three activities include fingerprint analysis, ninhydrin development, and cyanoacrylate fuming. Kit contains enough material for 15 groups. Teacher’s Manual and Student Study Guide copymasters are included
Though the use of blood type in a forensic investigation is not enough to prove guilt, it may aid in exonerating a potential suspect. In this activity, students act as lab technicians and assist investigators by examining evidence collected at a crime scene. Students first use a presumptive blood test to determine if a substance on a stained piece of cloth may be blood, and then determine the blood type of a sample collected at the scene. Students then compare their results to those of samples provided from two suspects. Kit contains enough materials for 10 groups. Teacher’s Manual and Student Study Guide copymasters are included