Maslow's Hierarchy of Needs. Definition. Maslow's hierarchy of needs is a theory of motivation and personality developed by the psychologist Abraham H. Maslow (1908â1970). Maslow's hierarchy explains human behavior in terms of basic requirements for survival and growth.
When you use ice to cool the ingredients for ice cream, the energy is absorbed from the ingredients and from the outside environment (like your hands, if you are holding the baggie of ice!).
First I said the amount of time it takes for ice cream to melt depends on the amount; the more ice cream you have, the longer it takes to melt because the heat energy has to spread from the outside to the inside of your ice cream shape. The second factor I mentioned can make melting faster or slower.