L11: 5.1 Physical and Chemical Changes and 6.1 Describing

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: