Rebecca Hall

Accessed on 26 th March 2013 at : /

What is Lightning? Who has seen Lightning? Accessed 26 th March 2013 at:

Lightning: The Facts Lightning is a bright flash of electricity. All thunderstorms produce lightning. Lightning is an electric current. Lightning is degrees C. More than 3 times hotter than the sun. Lightning is caused by an electrical charge in the atmosphere that is unbalanced. One single lightning strike could power a house for a week.

How does it happen? In thunderclouds small bits of ice collide with each other. This makes a electric charge All of those collisions create an electric charge. After a while, the whole cloud fills up with electrical charges. The positive charges or protons form at the top of the cloud and the negative charges or electrons form at the bottom of the cloud. Since opposites attract, that causes a positive charge to build up on the ground beneath the cloud. The grounds electrical charge concentrates around anything that sticks up, such as mountains, people, or single trees. The charge coming up from these points eventually connects with a charge reaching down from the clouds and - zap - lightning strikes! Accessed 26 th March 2013 at :

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EXPERIMENTS WHAT IS LIGHTNING? MATERIALS: fluorescent light bulb rubber balloon PROCESS: Turn all of the lights off in the room. (The darker the better!) Rub the balloon on your hair for several seconds. Then hold the statically charged balloon near the end of the light bulb. This will illuminate the bulb. Repeat the demonstration as many times as desired.

MATERIALS: aluminium pie pan small piece of wool fabric styrofoam plate pencil with a new eraser thumbtack PROCESS: Push the thumbtack through the centre of the aluminium pie pan from the bottom Push the eraser end of the pencil into the thumbtack. Put the styrofoam plate upside-down on a table. Quickly, rub the underneath of the plate with the wool for a couple of minutes. Pick up the aluminium pie pan using the pencil as a handle and place it on top of the upside-down styrofoam plate that you were just rubbing with the wool. Touch the aluminium pie pan with your finger. You should feel a shock. If you don’t feel anything, try rubbing the styrofoam plate again. Once you feel the shock, try turning the lights out before you touch the pan again. Check out what you see! You should see a spark!!

MATERIALS: comb a piece of wool, nylon or fur PROCESS: Rub a comb quickly against the piece of wool, nylon or fur for about a minute Hold the comb near a trickle of water from a faucet. The charged comb should attract the water toward it.

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