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!).
Explain that, in this lesson, we will take the different states. of matter we learned about and combine them to make something new âice cream! Guided Practice: Â· Set out ingredients to make ice cream: cream, sugar, vanilla, ice and salt. Â· Have students describe each ingredient as a solid, liquid, or gas.