Lesson 15. Chemistry in Everyday Life Lesson 15. Chemistry in Everyday Life I. Choose the best answer. 1. …
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Lesson 14. Acids and Bases Lesson 14. Acids and Bases I. Choose the best answer. 1. Acids are …
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Lesson 13. Water Lesson 13. Water I. Choose the best answer. 1. Water changes to ice at 0oC …
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Lesson 12. Atomic Structure Lesson 12. Atomic Structure I. Choose the correct answers: 1. The same proportion of …
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Lesson 11. Air Lesson 11. Air I. Choose the correct answers: 1. Which of the following is true …
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Lesson 10. Changes Around Us Lesson 10. Changes Around Us I. Choose the best answer 1. Burning of …
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Lesson 9. Matter Around Us Lesson 9. Matter Around Us I. Choose the best answer 1. The liquid …
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