Identify as Physical or Chemical Change – Flashcards
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Sodium Hydroxie dissolves in water
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Physical
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Hydrochloric acid reacts with potassium hydroxide to produce a salt, water, and heat
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Chemical
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A pellet of sodium is sliced in two
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Physical
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Water is heated and changed to steam
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Physical
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Potassium Chlorate decomposes to Potassium Chloride and Oxygen gas
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Chemical
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Iron rusts
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Chemical
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When placed in H2O, a sodium pellet catches on fire as hydrogen gas is liberated and Sodium Hydroxide forms
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Chemical
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Evaporation
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Physical
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Ice melting
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Physical
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Milk sours
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Chemical
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Sugar dissolves in water
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Physical
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Wood rotting
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Chemical
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Pancakes cooking on a griddle
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Chemical
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Grass growing in a lawn
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Chemical
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A tire is inflated with air
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Physical
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Food is digested in the stomach
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Chemical
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Water is absorbed by a paper towel
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Physical
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When copper metal is heated in concentrated nitric acid, the copper dissolves to form a deep blue solution, and a brown gas is evolved from the acid.
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Chemical
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An iron scorches a shirt when you leave it on one spot too long
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Chemical
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The tires on your car seem to be getting low in very cold weather
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Physical
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Your grandmother's silver tea set gets black with tarnish over time
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Chemical
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Spray-on oven cleaner converts grease in the oven into a soapy material
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Chemical
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An ordinary flashlight battery begins to leak with age and can't be recharged
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Chemical
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Acids produced by bacteria in plaque cause teeth to decay
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Chemical
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Sugar chars if overheated while making homemade candy
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Chemical
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Hydrogen peroxide fizzes when applied to a wound
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Chemical
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Dry ice "evaporates" without melting as time passes
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Physical
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Iron metal is melted
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Physical
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Wood burns in air
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Chemical
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A rock is broken into small pieces
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Physical
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Wax is melted over a flame and then catches fire and burns
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Chemical
