Folder Notes: A collection of Electricity and Magnetism videos and resources for students in grade 5 science.
Thomas Edison used his knowledge of current, conductivity, and electric circuits to create the light bulb. A circuit is needed to make current flow through a wire. A switch is used to open the circuit and stop the flow of electricity. Closing the switch allows the electricity to continue to flow. The light bulb stays on while the switch is closed.
This video explains what conductivity is and gives examples of conductors and insulators. Thomas Edison used the principle of conductivity in his work with electricity and electric currents. Modern electric wires are insulated. Large power lines are strung in the air or placed underground to protect people from the danger of the electric current.
This video describes how scientists and inventors learned about electricity and how to make use of it. The work of Benjamin Franklin, Allesandro Volta, Humphry Davey, Joseph Henry, Samuel Morris, Alexander Graham Bell, and Thomas Edison are discussed. Early inventions included the battery, electromagnet, telegraph, telephone, electric arc lights, and the light bulb.
Hans Christian Ørsted and Michael Faraday learned that electricity and magnetism are related. If a magnet is moved through a coil of metal wire, electrons will move along the wire and create an electric current. An electric current is also created if the coil spins and the magnet is held steady. This is how electric power generators work, including Thomas Edison's generator.
This video describes how electricity is generated at the Hoover Dam on the Colorado River. Water moving through the dam causes turbines to spin. The spinning turbines turn huge electric coils between very large magnets. This generates electric current that is delivered as electricity to homes and factories.
The flow of electrons creates electricity. It is transferred through series circuits or parallel circuits. A working circuit must be made up of a power source, an output device, a conductor, and a control device. Conductors, such as metal, allow electricity to pass through the circuit. Insulators, such as plastic, do not conduct electricity.
This video illustrates several uses of electricity. It also points out that it is possible to cut power to a particular area of a city by shutting off part of the electrical grid.
This video explains how electric circuits work. The information is presented in the form of a mystery about a series of electric power blackouts. The concepts described include electricity, series circuits, parallel circuits, parts of a circuit, power sources, output devices, conductors, control devices, remote control devices, switches, insulators, transformers, and resistors. The video concludes with a review quiz.
Understanding electric current helped Thomas Edison to invent the light bulb. Electricity begins with atoms. Atoms contain electrons. When many electrons move in the same direction, a current is created. This is how lightning occurs. Electrons flow in a stream or electric current from the cloud to the ground below.
This video points out that we have thousands of uses for electricity today. It describes how electric cars work. It also discusses electric circuits that are extremely small, but so powerful that they can help computers perform complex tasks. These circuits can be used to help build cars with electric motors, predict the weather, and guide spacecraft in space.
This video uses diagrams to show how series circuits and parallel circuits work. Electricity is delivered to homes in a city using parallel wiring. It begins with one big circuit running from a power station to the community and back. The parallel circuit system is made up of many smaller loops attached to larger loops.
A circuit allows electricity to flow from one place to another. The four main parts of a circuit are a power source, output device, conductor, and a control device. Conductors allow electricity to flow easily. Insulators inhibit the flow of electricity. Electricity flows in one path in a series circuit. A parallel circuit allows electricity to flow in more than one path.
This video explains that there are different kinds of energy. It gives examples of heat energy, light energy, sound energy, and electrical energy. Energy can be converted into different forms. A toaster converts electrical energy into heat energy.
Magnetism is an important force in our modern world. Without it, there would be no electricity. In 1820, Hans Christian Ørsted discovered that magnetism and electricity are related. Electric motors use electromagnets. Magnetism may explain how animals find their way when they migrate. The earth is also a magnet and has a magnetic field.
In 1752, Benjamin Franklin proved that lightning is part of a mysterious and dangerous force called electricity.