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Lesson 1:
What Is Matter Made Of?
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Lesson 2:
Why Are Materials Different?
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Lesson 3:
How Can Substances Be Identified?
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Lesson 4:
How Do Scientists Know When Substances Change?
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Lesson 5:
What Causes Substances to Change?
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Lesson 6:
How Do Changes to Substances Affect Their Weights?
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Lesson 7:
How Do Engineers Improve Materials?
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