Students will face all of these questions in this unit. 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.