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Seventh Grade (Grade 7) Molecules and Compounds Questions

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Grade 7 Molecules and Compounds
Which of the following best describes polymer molecules?
  1. They are made primarily of petroleum or petroleum byproducts.
  2. They consist of long chains of repeating smaller units.
  3. They all have cross-links that are made by adding a cross-linking chemical.
  4. All are toxic and must be handled with care.
Grade 7 Molecules and Compounds
What is a compound and give an example.
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