Students begin this unit by thinking about Watershed Changes Through Space and Time , Lesson 1, in which they recognize that their watershed is a dynamic system. It looks very different in different sections, and it changes as it develops through time. This lesson also serves as a review of the students previous work in the watershed. Much observable change is due to the influence of gravity. Gravity Vectors , Lesson 3, is a study of gravitational force as a vector, and includes a general introduction to understanding and working with vector quantities.
Motion is change in position.
Measuring Motion , Lesson 4, gives students practice in quantifying observed change, and also teaches them the concepts of uniform and accelerated motion. Making Change , Lesson 5, is what energy does. Students will learn that energy comes in different forms. We observe change when energy is transferred from one body to another or converted from one form to another. Since the source of much of the energy that causes change in the watershed is the sun, students investigate energy in the form of Light , Lesson 6.