question: What is the term for materials that have both a defined shape and a defined volume?
distractor3: gases
distractor1: liquids
distractor2: matter
correct_answer: solids
support: Solids are materials that have both a defined shape and a defined volume. They do not take on the shape of their container, as liquids and gases do. Solids can be either amorphous or crystalline. Amorphous solids (such as glass) do not have a well organized three-dimensional arrangement of molecules or atoms, so they lack a high level of order. On the other hand, crystalline solids display a highly ordered and predictable three-dimensional structure. In this section we will discuss the different types of crystalline solids.