7th Grade Science Guide

7.1: Field Forces 3 Dimensions & Progressions

Unit 2

Objective

Overview

Materials

●​ Determine that like poles repel and opposite poles attract. ●​ Understand that magnets exert force at a distance. ●​ Observe magnetic field lines for attracting and repelling magnets. ●​ Use magnetic field lines to predict if an object will be attracted to a magnet or repelled. ●​ Observe magnetic field lines produced by ferromagnetic materials. (Extension.)

●​ Students utilize different types of magnets and iron filings to watch magnetic forces at work in a simulation.

●​ Gizmo

Activity: Gizmo Charge Launcher

Objective

Overview

Materials

●​ Understand that

●​ The Charge Launcher Gizmo introduces students to electrostatic forces and challenges them to solve problems. Students launch charged particles across a grid containing fixed particles. The path of the launched particle is shown. Students can create a wide variety of paths by manipulating the particles on the grid and the speed of the launched particle.

●​ Gizmo

electrically-charged particles can exert force at a distance.

●​ Determine that like charges repel and

opposite charges attract. ●​ Predict the path of a launched charged particle based on the position of one or more fixed charged particles. ●​ Match a given path by manipulating fixed charged particles on a grid. ●​ Compare electrical forces to magnetic forces. (Extension)

Activity: Are You One with the Force?