(1) why does water become cold when we add a few ice cubes to it?\
(2) when heat is supplied to a substance what is the change that occurs at atomic or molecular level(hint-energy)?
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1. Conservation of energy. The energy (heat) gained by the melting ice cubes (at zero C) is equal to the energy (heat) lost by the liquid water. As the surrounding water loses heat, its temperature falls.
2. Objects can store heat because the atoms and molecules inside them are jostling around and bumping into one another like people in a crowd. This idea is called the kinetic theory of matter, because it describes heat as a kind of kinetic energy stored by the atoms and molecules from which materials are made.
2. Objects can store heat because the atoms and molecules inside them are jostling around and bumping into one another like people in a crowd. This idea is called the kinetic theory of matter, because it describes heat as a kind of kinetic energy stored by the atoms and molecules from which materials are made.
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