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Unformatted text preview: changed. During a physical change, chemical properties are not changed 2. What kind of evidence can we look for to show a process is a chemical change? a. Making brownies, because you can add sugar to water and boil the water to get the sugar out, however once the sugar is combined with the other ingredients you get a chemical reaction and the sugar cannot be restored to its original form. 3. Are gases (bubbles) always produced in a chemical reaction? a. No, there are other reaction besides gases, color change, thermal change (hot and cold), taste change (when applicable), corrosion and liquidfication ....
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- Spring '10