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LESSON 1: RECOGNIZING FOOD ADDITIVES | FACTORS OF SCIENTIFIC LITERACY AND FOUNDATIONAL OBJECTIVES, LEARNING OBJECTIVES, SCIENCE 10 BIBLIOGRAPHY | |||||||||||||
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WHAT IS A FOOD ADDITIVE AND HOW IS IT RECOGNIZED? THE TERM FOOD ADDITIVE HAS BEEN DEFINED IN A VARIETY OF WAYS. IN THE MOST GENERAL SENSE, A FOOD ADDITIVE MEANS ANYTHING THAT IS ADDED TO A FOOD. LOOK AT THIS SITE TO SEE SOME COMMON FOOD ADDITIVES. GO! WHEN YOU LOOK AT AN INGREDIENTS LABEL ON A FOOD PACKAGE, SOME OF THE INGREDIENTS WILL LIKELY BE FOOD ADDITIVES. FOOD ADDITIVES WILL BE THOSE SUBSTANCES THAT ARE NOT A FOOD THEMSELVES OR SOLD SEPARATELY AS FOODS. SALT, PEPPER AND SUGAR ARE CONSIDERED TO BE INGREDIENTS, NOT FOOD ADDITIVES. POTASSIUM NITRITE THOUGH IS A TYPE OF SALT THAT IS ADDED TO SOME FOODS ALONG WITH COMMON SALT (MOST OFTEN CURED RED MEATS OR POULTRY PRODUCTS} TO HELP PRESERVE THE MEAT. POTASSIUM NITRITE WOULD BE A FOOD ADDITIVE BECAUSE IT HAS CHANGED THE FOOD IN THAT THE FOOD TAKES LONGER TO SPOIL. THE TERM FOOD ADDITIVE HAS BEEN DEFINED DIFFERENTLY IN THE VARIOUS RESOURCES YOU MAY READ. IN ALL CASES THOUGH, A FOOD ADDITIVE IS SOMETHING ADDED TO THE FOOD OR A PROCESS THAT THE FOOD UNDERGOES. READ AT LEAST TWO OF THE FOLLOWING SOURCES ON FOOD ADDITIVES: WRITE A DEFINITION OF A "FOOD ADDITIVE" AND GIVE THREE EXAMPLES OF FOOD ADDITIVES. COMPARE YOUR DEFINITION AND EXAMPLES WITH THOSE OF ANOTHER CLASSMATE. READ PAGES 394 AND 395 OF THE CHEMICALS IN ACTION TEXTBOOK. COMPARE YOUR DEFINITION OF FOOD ADDITIVE TO THE ONE GIVEN IN THE TEXTBOOK. DO QUESTIONS 1 THROUGH TO 4 ON PAGE 395 OF THE CHEMICALS IN ACTION TEXTBOOK. COMPARE YOUR ANSWERS TO THOSE OF A CLASSMATE. DISCUSS DIFFERENCES THAT YOU FIND. PREPARE THESE QUESTIONS TO BE SUBMITTED TO YOUR TEACHER FOR GRADING. YOUR ASSIGNMENT QUESTIONS WILL BE GIVEN A MARK BASED UPON COMPLETENESS AND CORRECTNESS OF RESPONSES. SEE SAMPLE ANSWERS. |
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