noun: mystery; plural noun: mysteries 1.1. something that is difficult or impossible to understand or explain. synonyms: puzzle, enigma, conundrum, riddle, secret, problem a person or thing whose identity or nature is puzzling or unknown. 2.2. a novel, play, or movie dealing with a puzzling crime, esp. a murder. synonyms: thriller, murder mystery, detective story/novel, murder story, crime
Fun Senses Tests Go to Favorites on Internet & Word Document
Observation noun: observation; plural noun: observations 1.1. the action or process of observing something or someone carefully in order to gain information. synonyms: monitoring, watching, scrutiny, examination, inspection, survey, surveillance, consideration, study, review. the ability to notice things, especially significant details. 2.2. a remark, statement, or comment based on something one has seen, heard, or noticed. synonyms: remark, comment, statement, utterance, pronouncement, declaration.
noun: frame of reference; plural noun: frames of reference 1.1. a set of criteria in relation to which measurements or judgments can be made. "the observer interprets what he sees in terms of his own cultural frame of reference“ This is based on what YOU already know.
Prediction verb To indicate in advance foretell on the basis of observation, experience, or scientific reason
Observations + Inferences = Predictions A prediction may be right, or it may be wrong.
What Senses are used for Observation? 1. 2. 3. 4. 5.
What Senses are used for Observation? Sight Smell Touch Taste Hear
Name some professions that work with unknowns. 1. 2. 3. 4. 5. 6. 7. 8. 9.
Name some professions that work with unknowns. Scientists or Researchers Doctors, Veterinarians, Laboratory Workers Police, Detectives, FBI, CIA Inventors Mechanics Archeologists
Make a list of all the white powders you can think of.
The Seminar Seven Flour (F) Sugar (SU) Powdered Sugar (PS) Salt (SA) Baking Soda (BS) Plaster of Paris (PP) Corn Starch (CS)
Mystery Powders During this unit we will not use the sense of taste. Unless you are working in a Test Kitchen taste is not safe in the laboratory. Observation is the first thing we will use with our plain (single) powders. We will continue to observe during each laboratory test. A good researcher will take notes and pictures throughout the process.
Mystery Powder Tests Dissolve Test Fizz Test Burn Test Iodine Test
Dissolve Test Shake a small amount of powder in a test tube with water A Positive test – the liquid will be clear A Negative test – the liquid will be cloudy
Fizz Test Put one or two drops of vinegar on a small amount of powder Very Positive – the power fizzes Somewhat Positive – the powder fizzes a little Negative – No reaction is visible
Burn Test (outside) Place a small amount of power in an aluminum foil burn cup and hold over a flame Positives #1: look for turning brown, turning black, smoking, smells, burning Positives #2: no color change or smell but, POPs; no color change or smell but, clumps and slides Negatives: no change in color, no smell
Iodine Test Note – Iodine is poisonous if swallowed and will stain clothing and skin! Handle with care. Test – place one drop of iodine on a small amount of powder. Positive – powder will turn black or purple Negative – power will turn yellowish brown (the color of iodine)
Deduction Time Each powder has different characteristics. Based on your observations and test results you will be able to match each single powder to the answers on your key. The tricky part will come when you have two powders mixed together.
Double Unknowns Each double is made from two different singles SU-F SU-BS SU-CS SU-SA SU-PS SU-PP F-BS F-CS F-SA F-PS F-PP BS-CS BS-SA BS-PS BS-PP CS-SA CS-PS CS-PP SA-PS SA-PP PS-PP Do you see a PATTERN?