front 1 Classify the following observation as a physical or chemical change: Mothballs gradually vaporize in a closet. | back 1 Physical |
front 2 Classify the following observation as a physical or chemical change: hydrochloric acid etches calibration marks into a piece of glassware. | back 2 Chemical |
front 3 Classify the following observation as a physical or chemical change: Baking soda fizzes when mixed with vinegar. | back 3 Chemical |
front 4 Classify the following observation as a physical or chemical change: A rubber band is stretched. | back 4 Physical |
front 5 Classify the following observation as a physical or chemical change: Sugar is dissolved in hot coffee. | back 5 Physical |