"toasted bread" would most likely be a chemical change, because once you toast the bread, it is unable to go back to it's original state.
http://wiki.answers.com/Q/Is_tosted_bred_a_physical_or_...
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8. A chemical change is usually irreversible. This means that once a chemical change has occurred it forms a completely new substance with new chemical and physical properties. Example: table salt (a food product) is made up of two elements which chlorine (a poisonous gas) and sodium (a very reactive metal).
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www.clickandlearn.org/Gr9_Sci/review_chem_phys.htm
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A Closer Look: Chemical Vs. Physical Change ... Butter melts on warm toast. Bread becomes toast. ... Does this mean the change is half chemical and half physical? Though it has aspects of a chemical change, scientists would still classify the dissolution of salt as a physical change.
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www.learner.org/courses/essential/physicalsci/session4/...
www.learner.org/courses/essential/physicalsci/session4/closer1.html
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Activity Three: All Things Change Activities One and Two illustrate chemical reactions, or chemical changes. In a chemical change, ... Discuss whether the following changes are chemical or physical changes: * * * * * * * * * Toasting bread until it is burned. Boiling water. Baking a loaf of bread. Slicing a loaf of bread.
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www.wvu.edu/~exten/infores/pubs/fypubs/wl290.pdf
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. Toasting warms the bread, making it more pleasant to eat for some, and makes it crisp such that it holds toppings more securely. Toasting is also a common method of making stale ... Staling, or 'going stale' is a chemical and physical process in bread and other foods that reduces their palatability. Stale bread is dry...
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www.absoluteastronomy.com/topics/Toast
www.absoluteastronomy.com/topics/Toast
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Station 1: Toasting is a chemical change caused by Maillard, ... J. Peacock & A. Rowley Page 5 of 20 July 2004 Station 8: The rising of dough is a chemical change. Yeast, a single-cell fungi, metabolizes sugar to create alcohol and carbon dioxide. The carbon dioxide gas created gives bread its airy texture.
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apps.caes.uga.edu/sbof/main/lessonPlan/physChemChangeIn...
apps.caes.uga.edu/sbof/main/lessonPlan/physChemChangeInFoodPlan.pdf
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Distinguish between chemical and physical changes of matter. ... Java Games: Matching, concentration, word search, and flashcards ... This activity was created by a Quia Web subscriber. Learn more about Quia...
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www.quia.com/fc/73021.html
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Distinguish between chemical and physical changes of matter. ... Java Games: Matching, concentration, word search, and flashcards ... Copy this to my account...
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www.quia.com/jg/73021.html
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North Korea is believed to be the source of North Korea’s SCUD-C missiles and precursors for its chemical weapons, but the transfer of nuclear weapons, equipment, or technology would be a major escalation of that relationship.
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toastedbread.wordpress.com/
toastedbread.wordpress.com/
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