Accessed on 26 th March 2013 at :
http://totallycoolpix.com/2011/01/lightning /
Slide 4
What is Lightning? Who has seen Lightning? Accessed 26 th March
2013 at:
http://www.telegraph.co.uk/science/science-news/9824127/Lightning-may-cause-headaches.html
Slide 5
Lightning: The Facts Lightning is a bright flash of
electricity. All thunderstorms produce lightning. Lightning is an
electric current. Lightning is 20 000 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.
Slide 6
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 :
http://www.weatherwizkids.com/weather-lightning.htm
Slide 7
http://www.youtube.com/watch?v=Sn65RFvJKnk Click link below to
view video
Slide 8
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.
Slide 9
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 dont 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!!
Slide 10
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.
Slide 11
http://www.abc.net.au/local/videos/2012/06/04/3517746.htm Click
link below to view video