Understandings about scientific inquiry Scientific investigations involve asking and answering a question and comparing the answer with what scientists already know about the world. Scientists use different kinds of investigations depending on the questions they are trying to answer. Simple instruments, like rulers, provide more information than scientists obtain using only their senses. Scientists develop explanations using observations and what they already know about the world. Scientists make the results of their investigations public.
Scientists review and ask questions about the results of other scientists' work.
Physical Science Properties of objects and materials Objects are made from one or more materials and can be described by the materials from which they are made. Position and motion of objects The position of an object can be described by locating it relative to another object. An object's motion can be described by tracing and measuring its position over time. The position and motion of objects can be changed by pushing or pulling. The size of the change is related to the strength of the push or pull.