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!).
They will measure the temperature of the milk and the ice. After making ice cream, students will measure the temperature of the ice cream (if thermometer is sanitized), and the ice/salt mixture. Students will observe and describe the changes in the physical properties of the ingredients.