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If you leave milk in the refrigerator for too long it begins to go sour. Is this an example of physical or chemical change?
Wiki User
∙ 6y ago
This is a chemical change.
Wiki User
∙ 6y ago
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Color change physical or chemical change?
Almost certainly chemical. Color ... that is, absorption or emission of electromagnetic radiation in the visible band ... is usually due to the electronic structure of the compounds. Changing the electronic structure usually means that a bond has broken or formed, which is a chemical change. However, certain types of color changes are physical. For example, when you heat a piece of metal and it begins to glow red, then orange, then yellow as you increase the heat, that's a purely physical change. Certain types of colors... like the swirling colors you see in a soap bubble... are produced by physical phenomena, and the changes there are physical (the color depends on the thickness of the soap film). "Mood Rings" are another example of something that exhibits a physical color change.
What begins in the chemical digestion of foods containing?
Chemical digestion begins in the mouth. Saliva contains enymes and breaks the food down chemically.
How physical weathering begins?
Physical weathering begins the moment a rock body is uplifted and fractured, or exposed to the atmosphere, along with it's differences in temperature, sunlight, and water.
What is the watery liquid that begins the chemical breakdown of food?
Saliva
What are substance you start with in a chemical reaction called?
The reactants
Is melting a Peep an example of a physical change?
It certainly is, unless you get it so hot it begins to char (then it becomes chemical).
Is it a chemical change if the water begins to freeze?
Freezing is a physical change.
You take a shower and your hair begins to dry is that a chemical or physical change and why?
Physical - the water is just evaporating.
When you burn a marshmallow is it chemical change or physical change?
Toasting a marshmallow is actually a chemical change. The marshmallow becomes black and crispy, it also no longer tastes the same. Thus, it is a chemical change.Roasting a marshmallow is an example of a chemical change. Generally when you heat food in the process of cooking, you will cause a chemical change.
You place an ice cube on the sink and it begins to melt . is this a chemical reaction?
This is a physical change. Chemical changes are changes in "what things are made out of".
When you shower and your wet hair begins to dry is that a chemical change?
No, there is no change at all to you hair. _____________ This is not a chemical change, but a physical change instead.
Is a tea kettle begins to whistle a physical or chemical change?
It's physical. It just changes from state of matter to another one.
What does a rock begin to do when it is exposed to weather?
It begins the process of weathering, involving physical and chemical attack.
A tea kettle begins to whistle chemical or physical?
When a tea kettle whistles, it is because the liquid inside turns to steam and is forced by pressure through the small opening in the kettle lid. This phase change is a physical change, not a chemical one.
Color change physical or chemical change?
Almost certainly chemical. Color ... that is, absorption or emission of electromagnetic radiation in the visible band ... is usually due to the electronic structure of the compounds. Changing the electronic structure usually means that a bond has broken or formed, which is a chemical change. However, certain types of color changes are physical. For example, when you heat a piece of metal and it begins to glow red, then orange, then yellow as you increase the heat, that's a purely physical change. Certain types of colors... like the swirling colors you see in a soap bubble... are produced by physical phenomena, and the changes there are physical (the color depends on the thickness of the soap film). "Mood Rings" are another example of something that exhibits a physical color change.
Is an old garden rake that is rusting a physical change?
No. It is chemical change because that rust will never be a metal again. A chemical change is a change that is irreversible. ( Ex. Your rake ( that rust will never be a metal again.) A physical change is a change that still has the same compound. Ex. sand ( rocks, just littler.)
Is a well cooked steak chemical or physical change?
Cooking involve many chemical processes but also some physical processes as evaporation or melting.
