Your breakfast this morning was so nutritious! You had two eggs, a slice of toast and some orange juice. You were lucky, though ... your mom noticed some smoke coming from the toaster and took your toast out before it burned. Thanks to her, your toast was a perfectly crunchy and light-brown in color: During this process, did the bread undergo a physical change or a chemical change? What evidence from the story or the image proves that you are correct?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

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