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The answer is actually microorganisms.In school we did a topic about it so it will be chemicals.
Aleema
hope it helpedxx
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∙ 13y ago
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What are some examples of a phyiscal reaction?
water turning to ice... water turning to vapor. candle wax turning from solid to liquid and then solid again... crumpling a paper is a physical while burning it is chemical...
Is a substance freezing a chemical reaction?
No, freezing water is not a chemical reaction. It is a physical change which water undergoes at temperatures below 0oC. At higher temperature the ice melts back to water again.
Dry ice turning into carbon dioxide physical or chemical?
i think it is chemical but it may be physical.
Is turning litmus paper red from blue a chemical change?
yes. it is a chemical reaction
Why milk turning into curd is a chemical change?
because it is irreversible and it has a new substance
Is turning an egg into a pancake a chemical or a physical reaction?
chemical -you cant turn the pancake back into an egg :)
Is turning a penny gold a chemical or physical reaction?
Anything else then dropping it in molten gold is chemical
Is bananas turning black if you leave them in a warm cupboard for a week a chemical reaction and why?
Yes, it is a chemical reaction, because the colour of the banana has changed, which shows that a chemical reaction has taken place. Also, if the banana has gone black and turned bad, you can't change it back to it's original form, which proves that it is a chemical reaction and not a physical reaction. Remember - A chemical reaction has definitely taken place if : It's colour has changed A gas is given off There are energy changes Or, it can't be changed back to what it used to be! :) Hope this helps!!
Is milk rotting a physical or chemical reaction?
Physical changes are like water turning into ice, they can be reversed. Chemical changes form a new substance. Soured milk can not be reversed, so it is chemical.
Is the Statue of Liberty a physical change or a chemical change?
No its a chemical change because the acid in the rain reacts with the copper in the statue having a reaction oxidizing it and turning it green.
Is a piece of avocado turning brown a chemical change or a physical change?
Physical
What are some examples of a phyiscal reaction?
water turning to ice... water turning to vapor. candle wax turning from solid to liquid and then solid again... crumpling a paper is a physical while burning it is chemical...
Is milk turning sour a physical or chemical change?
Milk turning sour is a chemical change.
Is a substance freezing a chemical reaction?
No, freezing water is not a chemical reaction. It is a physical change which water undergoes at temperatures below 0oC. At higher temperature the ice melts back to water again.
Dry ice turning into carbon dioxide physical or chemical?
i think it is chemical but it may be physical.
Is bannan turning rotten a chemical or physical change?
This is a chemical change.
What is a flower petal turning brown a physical or chemical change?
Chemical
