LESSON 4: What Makes Things Stop?Time: 40 minutes
Lesson Overview
In the first three lessons of the module, students learned about movement, force, and gravity. They discovered different factors that affect the way an object moves, how to get an object moving, and why some objects travel faster or farther than others. In Lesson 4, students will learn about a force that slows objects down—friction.
Lesson Objectives
By the end of this lesson, students should be able to:- Explain what friction is.
- Give examples of how friction affects motion.
- Use rulers to measure distance traveled.
Lesson Essential Questions
1. What is friction?
2. How does friction affect movement?
3. How can you use rulers to measure distance traveled?
Videos & Interactives
Fun-damentals Making Things Move What makes something move? What speeds it up or slows it down? Find out in this very moving Fun-damental.
Exploration Friction Have you ever skated over ice? Do you think you can skate the same way over a concrete road? Of course not. Friction stops your skates from sliding over the concrete road. Let's learn more about friction.
Video Segment Friction Friction is a force caused by two objects rubbing together, which slows motion. Friction can cause heat, and allows movement, as well stopping.
Video Segment Example 1: Measuring Length in Inches Length is measured in inches using a ruler or tape measure. To measure accurately, the zero at the end of the measuring tool must line up with one end of the object being measured.
Downloads
Standards Addressed in K-2 (PDF) Faster and Slower Worksheet (PDF) Surfaces Worksheet (PDF) Friction Worksheet (PDF) Making Things Move Interactive Fun-damental - Teacher Guide (PDF) Making Things Move Interactive Fun-damental - Student Worksheet (PDF) Friction Interactive Exploration - Teacher Guide (PDF) Friction Interactive Exploration - Student Worksheet (PDF)