| On our trips Alex has always asked questions that we have had to look up the answers to, so I decided to give those questions there own page |
| Why don´t birds get electrocuted when sitting on electricity wires? Because for electricity to flow, it needs a beginning and an end point, and something to pass through (a conductor) to get there. This is called a complete electrical circuit. When a bird perches on a power line it is only standing at a single point on a single line, so electricity can't pass through it from one point to another. However, people are obviously bigger than birds (and don't have as good balance!). So on a power pole they can become conductors, allowing an electrical current to flow through them from a wire to the ground – a complete electrical circuit. And it only takes a small amount of electricity to get an electric shock – a current less than that needed to light a light bulb can be fatal. Why isn´t Pluto a Planet any more? Because it is too small and it´s path crosses with the path of Neptune. |