Magnetism Part II The second part of this slide show presents a few of the hands-on lab stations that should be setup around the classroom for the students to experiment with electricity. The slides cover the materials needed, a diagram of the setup, and the directions for each activity. For 2nd graders, a teacher or volunteer needs to be with the kids at each of the four stations. All of these stations helped keep the students active and participating while I presented the material. These slides are to be used as a reference for the teacher or shown as a wrap up or review of the activities for the students.

GPS S8P5. Students will recognize characteristics of gravity, electricity, and magnetism as major kinds of forces acting in nature. c. Investigate and explain that electric currents and magnets can exert force on each other.

Station # 1 - Magnets Magnetic force is a push or pull that is exerted by a magnet. A magnet has two poles North & South Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Magnets Poles that are alike repel or push apart Poles that are unalike attract or pull together Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Magnets The area surrounding a magnet in which the magnetic force exists is called the magnetic field. Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Magnetic Field These images describe how the magnetic force is distributed in the space around and within the magnetic field.

Magnets The production of a magnetic field by electric current is called electromagnetism. Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Magnets A magnet that is made by passing an electric current through a coil of wire wrapped around an iron core is called an electromagnet. Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Magnets An electromagnet consists of an iron core placed inside a wire coil. The magnetic field strength of a wire coil carrying an electric current increases in direct proportion to the number of turns of the coil. Magnets In Part I, the idea of positive and negative charges was introduced. Since magnets have a positive and a negative charge, they are very useful tools in illustrating charge (because they can push or pull other things as well as each other). They also teach the students about things they cannot see. You cannot see the magnetic field, but when the magnets repel or attract each other, you know that some type of charge or magnetic field is present.

Changing the Strength of an Electromagnet To Increase Strength To Decrease Strength Increase strength of current Decrease strength of current Add more coils of wire Use fewer coils of wire Increase size of iron core Decrease size of iron core

Uses of Electromagnets A generator is a device that transforms mechanical energy into electrical energy. The electrical systems of many cars use electricity produce by generators to work.

Uses of Electromagnets An electric motor is a device that transforms electrical energy into mechanical energy. Washers and dryers are two appliances that operate using motors.

THE END The End