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CHAPTER 12 - MATTER
Lesson 1
What Are Chemical Changes?
Homework: WB p 117, 120A
I. Physical Changes
A. What is an example of a physical change?
B. What is the difference between a chemical change and a physical change
C. How does iron turn into iron oxide when it is exposed to water?
D. If you crumple a piece of paper into a ball, is the change physical or chemical? Physical Why?
II. Chemical Changes and Evidence of Chemical Changes
A. List three types of evidence of chemical change.
B. Compare the second and third pictures of the copper tree experiment. Aside from the forming of
solid crystals, what other evidence of chemical change in the liquid do you see?
C. When you cook an egg, do you think a chemical change occurs? Why or why not?
D. What evidence shows that a chemical change might have taken place on a piece of iron?
E. When some kinds of antacid are dropped in water, gas is released in the form of bubbles. How
does the production of a gas indicate a chemical change?
F. Rusting iron is an example of a chemical change. Propose other examples of chemical changes.
CHAPTER 12 - MATTER
Lesson 2
What Are Some Kinds of Chemical Reactions?
Homework: WB p. 118-119, 121A
I. Chemical Equations
A. What do chemical equations show?
B. What are the two parts of a chemical reaction?.
C. How is a chemical equation similar to a math equation? How are they different?
D. If you collected all the ashes and captured all of the gas from a burning log, what would the
total mass be equal to?
II. Types of Chemical Reactions
A. Describe three kinds of chemical reactions.
B. In the chemical reaction described on page 379, magnesium reacts with oxygen gas. What kind
of chemical reaction is this? Explain.
C. How can chemical properties be used to separate substances in a mixture or compound?
D. A water molecule is made up of two hydrogen atoms and one oxygen atom. What kind of
chemical reaction would produce water from hydrogen and oxygen??
E. Which kind of chemical reaction is most similar to two baseball teams trading players?
F. In which kind of chemical reaction do compounds split apart to form smaller compounds or
elements?
G. Which kind of chemical reaction is most similar to two baseball teams trading players?
H. A water molecule is made up of two hydrogen atoms and one oxygen atom. What kind of
chemical reaction would produce water from hydrogen and oxygen?
CHAPTER 12 - MATTER
Lesson 3
How Are Chemical Properties Used?
Homework: WB p. 122A
I.