On a warm summer day Mrs. George sliced some strawberries and placed them in a zip- pered sandwich bag and sealed it with enough air to provide protective air space for the strawberries. She then placed the sealed bag in the refrigerator to keep the strawberries cool. Describe what happens to the bag as it cools in the refrigerator. Why does this happen? Hint; Refer to the air in the bag.
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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