| A | B |
|---|
| light | a form of energy that travels in straight lines |
| opaque | a material that light does not pass through |
| current | the continuous flow of electricity |
| insulator | a material that electricity does move through easily |
| closed circuit | a continuous path (one that is not broken) through which electricity can flow |
| magnet | an object that has the property of attracting certain metals- iron, nickel, cobalt |
| open circuit | a path that is broken (has an opening) through which electricity cannot flow |
| electromagnet | a magnet made when any electric curren passes through a coiled wire wrapped around an iron core |
| reflection | the bouncing back of light from a surface |
| absorption | the taking in of light as it strikes a material |
| visible spectrum | the colors of light that are produced from white light |
| lens | a piece of transparent material with surfaces that bend out ( or in) , used to form an image |
| circuit | a closed path through which electricity flows |
| translucent | a material that scatters or absorbs most of the light that strikes it. some light passes through |
| magnify | to enlarge visually |
| electricity | a form of energy that can be changed to light, heat, or sound |
| switch | a device that breaks or completes the path a current can follow in a circuit |
| lodestone | a mineral magnetite that is naturally magnetic |
| compass | an instrument that has a magnetic needle that points to the Earth's magnetic North |
| series circuit | an electric circuit in which the parts are connected in a single path |
| parallel circuit | an electric circuit in which the parts are connected in two paths |
