The carbon dioxide bubbles cause the dough to rise. In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it.
#Physical and chemical properties and changes key full
The bread is black and the kitchen if full of smoke. Your friend decides to toast a piece of bread, but leaves it in the toaster too long. The student cuts a slice off the loaf and spreads butter on it. Umm! A student removes a loaf of bread hot from the oven. The first one has been done for you to use as an example. Decide whether a physical or chemical change has occurred and give evidence for your decision. Two substances are mixed and light is produced.Ī piece of ice melts and reacts with sodium.Ī marshmallow is toasted over a campfire. Two chemical are mixed together and a gas is produce. If the substance has been changes into another substance, a chemical change (C) has occurred. Physical and Chem ical Changes Part A Can you recognize the chemical and physical changes that happen all around us? If you change the way something looks, but haven’t made a new substance, a physical change (P) has occurred. Identify the following as physical (P) or chemical (C) changes. a change in the physical and chemical properties 2. _7.īlue color density flammability (burns) solubility (dissolves) reacts with acid supports combustion sour taste Identify the following as a chemical (C) or physical property (P): _1. matter will be changed into a new substance after the reaction indicates how a substance reacts with something else 2.
PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES Name _Key_ġ.
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