Teacher Page IV. Force, motion, and Mechanical energy A. relative motion 7th grade assessment Science standards 1.1; 1.3; 1.4; 3.5 View before using lesson with students, sample answers and questions appear with mouse click. Discuss student journal entries. Students should be able to describe the position, direction and speed of a person on a train with respect to someone else in the train and with respect to someone on the ground.

In your journal describe motion. An object is in motion when its distance from another object is changing. The motion of an object can be described as a change in position, direction and speed.

Suppose you walk toward the rear of a moving train. Describe your motion as seen by another person on the train. Describe your motion as seen by another person on the ground.