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Changes to States of Matter


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A series of free Science Lessons for 7th Grade and 8th Grade, KS3 and Checkpoint Science in preparation for GCSE and IGCSE Science.

Changes to the States of Matter
Melting and Evaporating - showing particles and illustrate by experiments



Sublimation of Carbon Dioxide
Sublimation of dry ice

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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