Everything around us is changing all the time! Teach your little scientist the difference between physical and chemical changes, on a molecular level. He'll think about the difference between chopping a log and burning it. Can he think of any more examples?
کاربرگ Physical and Chemical Changes
رایگان
سطح سختی
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متوسط |
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نوع فایل
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پی دی اف |
توضیحات
