SNC2D1 Date:__________________ Name:_____________________ L11: 5.1 Physical and Chemical Changes and 6.1 Describing Chemical Reactions https://www.youtube.com/watch?v=M8tyjwB42X4 PHYSICAL CHANGES A change where one or more ____________ of a substance are altered, but the _____________ (make up) of the substance does ______________. _____________________________ are formed. ___________ of these changes ________________. Examples: ____________________ (such as melting ice into water They are both water!) Folding or cutting paper Breaking a ceramic plate Dissolving salt in water CHEMICAL CHANGES OR CHEMICAL ____________________ A change in matter that involves the ____________________________________ (with a new composition and new properties). __________________________________. ______________ Starting Substance(s) ____________ New Substance Examples of chemical reactions: ___________: Iron + Oxygen Rust (New Substance) ___________: burning logs ashes + heat _________________________________ Evidence of a Chemical Change / Reaction: 1. A change in __________ appears 2. ____________ is given off or absorbed 3. ____________ are produced (form the formation of ____) 4. A _____________________ is formed 5. A change in ___________ 6. The change is ______________________ Evidence https://www.youtube.com/watch?v=cZMkqagL8Ps Which one is it? Physical or chemical change?: https://www.youtube.com/watch?v=9ZZSQzXSNWw Describing Chemical Reactions Chemical reactions are always described with the ___________ (substances at the start of the reaction) and the _______________ (substances left after the reaction). With an arrow between them that signifies “yields”. reactant 1 + reactant 2 product 1 + product 2 Chemical reactions are described by using a __________________ or a __________________. word equation _______ chemical equation ________ chemical equation Homework: Complete 5.1 p. 179 # 3, 5, 7, 9-11; Read 6.1, draw the atoms:
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