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Standard 1
Students will understand the nature of changes in matter.
Objective 2 : Observe and evaluate evidence of chemical and physical change.
HOUR a.) Identify observable evidence of a physical change (e.g., change in shape, size, phase). b.) Identify observable evidence of a chemical change (e.g., color change, heat or light given off, change in odor, gas given off). c.) Observe and describe chemical reactions involving atmospheric oxygen (e.g., rust, fire, respiration, photosynthesis). d.) Investigate the effects of chemical change on physical properties of substances (e.g., cooking a raw egg, iron rusting, polymerization of a resin).
VOCABULARY atmospheric oxygen change in odor fire photosynthesis respiration unexpected color change bubbling/fizzing chemical change gas released physical change rust change in heat chemical reaction new substance products smoke released change in light combustion oxidation reactants substance
Content Pre-test
Review (list low tag values from your report that are below 80%)
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Content Post-test
Vocabulary Posttest
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WORD : atmospheric oxygen Picture/Graphic/Symbol
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WORD : bubbling/fizzing
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WORD : change in heat
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WORD : change in light
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WORD : expected color change
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WORD : chemical change
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WORD : chemical reaction
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WORD : combustion
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WORD : fire
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WORD : gas released
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WORD : new substance
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WORD : oxidation
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WORD : photosynthesis
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WORD : physical change
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WORD : products
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WORD : reactants
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WORD : respiration
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WORD : rust
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WORD : smoke released
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WORD : substance
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WORD : unexpected color change
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STANDARD 1 OBJECTIVE 2: Observe and evaluate evidence of chemical and physical change.
S1O2a: 1.) List at least 8 observable evidences of a physical change. (Please do not repeat physical property examples. For example “changing the shape of a rock” and “changing the shape of playdough” CANNOT be counted as 2 different entries).
1.) 7.)
2.)
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6.) 12.)
S1O2a:
2.) Which of the following is an example of a physical change?
A. evaporation in a swamp cooler
C. digestion of a hamburger
B. electricity produced by a dry cell
D. rusting of a car body
EXPLAIN YOUR ANSWER!!!!
S1O2a:
3.) Which of the following is an example of a physical change but not a chemical change?
A. A log gives off heat and light as it burns. B. A tree stores energy from the Sun in its fruit.
C. A penny lost in the grass slowly changes color. D. A water pipe freezes and cracks on a cold night.
EXPLAIN YOUR ANSWER!!!!
S1O2b: 1.) List 8 observable evidences of a chemical change.
1.) 7.)
2.)
3.)
8.)
9.)???
4.)
5.)
10.)???
11.)???
6.) 12.)???
S1O2b 2.) Kelley mixes and stirs two chemical solids together. While stirring she notices that the temperature of the mixture is increasing. What best explains this temperature rise?
A. The reaction of the two chemicals is taking in heat
B. The beaker is getting hot because of the stirring
C. The reaction of the two chemicals is releasing heat
D. The beaker is getting hot because the solids are changing phase
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EXPLAIN YOUR ANSWER!!!!
S1O2b
: 3.)Which of the following is a characteristic of all chemical changes?
A. A different state of matter is produced. B. Some mass is converted to energy.
C. Some form of light is given off. D. New substances are formed.
EXPLAIN YOUR ANSWER!!!!
S1O2b
: 4.) In a laboratory experiment, you mix two colorless liquids together. After a few minutes you notice the liquid has turned purple. What can you infer has happened?
A. A physical change has taken place, and a mixture has formed
B. A chemical change has taken place, and a mixture has formed
C. A physical change has taken place, and a new substance has formed
D. A chemical change has taken place, and a new substance has formed
EXPLAIN YOUR ANSWER!!!!
S1O2c: 1.) List at least 4 chemical reactions that involve atmospheric oxygen.
1.)
2.)
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5.)???
S1O2c: 2.) Describe how you know if a chemical equation/reaction involves oxygen?
S1O2c:
3.) Which substances are necessary for plants to produce sugar during photosynthesis?
A. water, soil, chlorophyll
C. water, carbon dioxide, light
EXPLAIN YOUR ANSWER!!!!
B. water, minerals, cell wall
D. water, roots, oxygen
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S1O2c: 4.) What are the reactants for photosynthesis?
A. soil and chlorophyll
C. water and minerals
B. oxygen and carbon dioxide
D. water and carbon dioxide
EXPLAIN YOUR ANSWER!!!!
S1O2c: 5.) What materials are required for combustion to occur?
S1O2c: 6.) What do all the following chemical reactions have in common? combustion respiration photosynthesis rusting
A. they all involve iron B. they all involve carbon dioxide
C. they all involve carbon D. they all involve oxygen
S1O2d- 1.) Explain why chemical changes change BOTH chemical and physical properties. Use the the words reactants and products.
S1O2d2.) Explain at least one example of how a chemical change changed both physical properties and chemical properties from your demos. Describe the properties before AND after.
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