Four friends are at the beach on a sunny day they noticed the sand is much warmer than the ocean water they wondered that the temperature of these surfaces differed even though they were exposed to the same amount of sunlight

The sand is much warmer than the water because water has a higher specific heat, or it takes more energy to change the temperature of water. Since they are absorbing energy from the same place, the sun, the sand will get warmer faster because it takes less energy to change the temperature.

Another reason could be because the water is constantly mixing with the water below it which is not exposed to the sun and because of this the water remains at a lower temperatre. The sand however has the same part exposed to the sun unless an external force, a foot, umbrella, wind, etc comes to move it. So it is able to absorb the sun for longer than the water.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

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