The flesh of a cut apple turns brown when left out in the air. Is this a chemical change or a physical change? Why?

Chemical Change

Explanation:

apples turn brown because of a chemical reaction named oxidation which is cause by oxygen of the air

Oxygen is one of the most reactive chemicals known to exist.. There are a variety of oxidation reactions .. The fridge does not stop chemical reactions so bacteria will still rot the food eventually and out side of the fridge it would rot quicker than the fridge .

a plasma is a warm ionized gasoline consisting of approximately equal numbers of definitely charged ions and negatively charged electrons. the characteristics of plasmas are notably unique from the ones of ordinary neutral gases in order that plasmas are considered a awesome "fourth kingdom of remember."

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: