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For number 1 The changing of metal into rust is an example of chemical change. 1. Which of the following statements is an evidence to the fact about the formation of rust? A Chemical properties and physical properties are the two properties of matter B Chemical property is the charactenstic of matter that change first before a certain property can be observed C.Physical property is the characterstic of matter that can be readily observed without changing its composition D. The chemical and physical changes that matter undergo help determine the best way to minimize waste For number 2 Materials made of plastic, silk, leather, glass, or rubber are insulators 2. Which of the following statements is NOT an evidence to the fact about non- conductors of electricity? A. Electncity cannot pass through materials made of plastic, silk, leather, or glass B Insulators do not allow heat and electricity to pass through them C Materials are conductors if electricity can pass through and insulators if otherwise D. Materials that are made of plastic, silk, leather oil, glass, or rubber are non- conductors
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