that starts as a solid below its freezing point. 180 160 E D 140 120 C 100 80 B A 6 8 10 12 14 16 18 20 Time (ninutes) 22 1.Which letter represents the range where the liquid is being heated? 2. What is the freezing point of the substance? °C 3. What letter represents the process of melting? 4. Which letter represents the state that is most compressible? 5. At what time evaporation completes? minutes 6. Which letter represents the state where strong intermolecular forces exist? Temperature (°C)

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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.