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1. How many elements are in the compound: BrNMgCPbFC 7 8 14 15 2. All the of the following are evidence of a chemical reaction/change except: a gas being created pouring two liquids together an unexpected change in color the temperature of a substance raising 15 degrees 3. Mrs. Davis mixed two liquids together. Aftersitting for 2 minutes the liquids became a solid.This is evidence of: liquids always mix and form a solid there was no chemical change Mrs. Davis waited to long Mrs. Davis has seen a chemical change. 4. Mrs. Ruble poured two solids into a plastic bag. She then poured in a red liquid. The substances in the bag quickly became hot. Has Mrs. Ruble seen a chemical reaction? Yes No 5. Mrs. Davis burned sugar in class on a hot platefor everyone to see. The sugar changed from a white solid to a nasty black solid. She explained that the main piece of evidence that proves the sugar chemically changed was: the sugar doesn't taste as good the sugar changed color the sugar can change back to its original state sugar can change randomly on it's own 6. All of the following are examples of chemicalchanges except: gas being created leaves changing color carbon and oxygen separating from CO2 dissolving sugar in water Tearing paper, ice melting, and dry ice turning back into a gas are examples of chemical changes. 7. True or False True False |