Lesson 9 Energy, Electricity and Magnetism
- Electricity: Materials can receive electrical charges, for example with static electricity. They can be charged positively or negatively. Opposite charges attract each other.
Electrical currents are the transfer of an electrical charge through objects that have opposite electrical charge. Electrical currents are related to electrical energy.
- Materials and electrical currents: There are two types of materials, conductive materials (That allows an electrical current to pass through it, cupper salt water…) and Insulating materials ( don´t allow an electrical current to pass through it, wood, plastic…)
- Electrical circuits: are groups of elements that allow an electrical current to flow:
They have different parts: Generators (batteries, alternators, solar panels), Conducting cables, Switches and Receptors (lightbulbs)
- Magnetism: some materials can attract or repel objects. This property is called magnetism and the objects are called magnets. Opposite poles attract and the same poles repel each other. Magnetic fields are the influence magnets have on the space around them. We use magnetism to build compasses or storing info
