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Many of the experiments on this site call for you
to use some type of flame as a source of heat.
At the
beginning of every experiment on this site which requires
an open flame, you will see this warning or something
similar:
CAUTION! Always be careful to
follow all safety precautions when using fire, and use
with adult supervision only! Keep your alcohol lamp
or candle in an aluminum pie pan, and keep the flame at
least three feet away from anything that can burn, unless
otherwise instructed.
You should always heed this
warning. You only need a small flame to do the
experiments, and if you follow all safety precautions and
work with fire only when an adult is around and can
supervise, you should have no problems. But make no
mistake about it. Fire can burn you seriously, and
if it gets out of control, it can destroy your home, or
even kill. Always be extremely careful when working
with fire!
CAUTION!
About 1 cm (½ in) of water should always be placed
in the pie pan as explained in each experiment below.
The water was omitted from the photographs below
only so you could better see the construction
details.
CAUTION!
Always
be careful to follow all safety precautions when using
fire, and use with adult supervision only! Keep your
alcohol lamp in an aluminum pie pan, and keep the flame at
least three feet away from anything that can burn, unless
otherwise instructed.
An alcohol lamp, if
properly constructed, will provide one of the safest
sources of flame for the experiments on this site.
Materials Needed:
Small glass jar such as a baby food jar with a tight fitting
metal lid; piece of
cotton cloth or rope; large nail; isopropyl rubbing
alcohol from the pharmacy (about 90% is best); disposable
aluminum pie pan; water.
When selecting a jar, you
should decide what kind of stand you want to use with it and
pick a size that will fit underneath the stand. (See
below.)
Procedure:
Using the nail, punch a hole in the underside of the metal
lid. Cut a piece of the cotton cloth (a handkerchief
or cloth from a cotton t-shirt works well) about 7 cm
(3 in) square and roll it into a tight roll. Or, cut a
piece of thin cotton rope about 7 cm (3 in) long. Push the
rope or rolled cloth up through the bottom of the lid so
that about 1 cm (1/4 in) sticks out above the top of the
lid. This is the wick. Next, fill the jar about
½ full of alcohol and screw the lid down onto the jar
tightly. Pour about 1 cm (½ in) of water into the
bottom of the pan, and place the jar and lid in the middle
of the pie pan. Allow the alcohol to soak up into the
rope or cloth.
The aluminum pie pan serves as
a safety pan. If your alcohol lamp should tip over or
you should drop a lighted match, the water will put out
flame. You should always make sure that you
use a pan with water, and that the alcohol lamp is far
away from anything that could catch fire.
Carefully place a lighted match to the rope or cloth wick.
What To Look For:
The alcohol lamp should light and burn with a pale blue
flame.
Going Further: Alcohol
is drawn up into the cloth wick by a process called
"capillary action." (You can learn more about
capillary action on the Liquids - Part 2 page on
this site.) As the alcohol burns, more alcohol is
drawn up to replace that which has burned. If you need
a smaller flame for an experiment, shorten the wick.
If you need a larger flame, lengthen the wick.
Obviously, you should not touch the wick while it is hot!
CAUTION!
Always
use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from
your body, particularly your eyes.
CAUTION! Always be careful to
follow all safety precautions when using fire, and use
with adult supervision only! Keep your candle in an
aluminum pie pan, and keep the flame at least three feet
away from anything that can burn, unless otherwise
instructed.
The following experiment will
show you how to safely use a candle in your experiments.
Materials Needed:
Candle; aluminum pie pan; water; sharp knife; matches;
modeling clay.
Procedure: Cut your
candle down to less than the radius of the bottom of
the pie pan - about 7 cm (3 in) will work well
for a typical pie pan. (The radius is 1/2 of the width
of a circle.) Get an adult to help you do this with a
sharp knife, and be careful! Next, roll a small piece
of modeling clay into a small "snake" and wrap it
around the bottom of the candle. Place the candle in
the center of the pie pan and press the clay onto the pan to
so that it holds the candle securely. Make sure that
the candle is straight and steady in the pan. Place
about 1 cm (½ in) of water in the bottom of the pan.
The candle is now ready to use.
CAUTION!
Always
use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from
your body, particularly your eyes.
CAUTION! Always be careful to
follow all safety precautions when using fire, and use
with adult supervision only! Keep your alcohol lamp
or candle in an aluminum pie pan, and keep the flame at
least three feet away from anything that can burn, unless
otherwise instructed.
This experiment will help
you construct a small stand to use with your alcohol lamp
or candle for heating.
Materials Needed:
Home canning jar ring; three wooden clothespins (Don't use
plastic!); a small piece of wire screen or mesh (metal only,
available from the hardware store); alcohol lamp or candle
with safety pan; matches.
Procedure: Clip the
three clothespins to the underside of the jar ring as
shown. Have an adult to help you to cut about a 9 cm
(3 ½ in) square piece of wire mesh or screen. Place
the screen on top of the tripod. Your stand is ready
to use with your alcohol lamp or candle stand. Always
use the pie pan and water with either one.
IMPORTANT!
This stand will only work with an alcohol lamp or candle
that is shorter than the clothespins. If you plan on
using an alcohol lamp with this stand, you should select a
jar that is small enough to fit under the stand with about
an inch or so to spare. If you are using a candle, you
will need to cut it down to size. Get an adult to help
you do this!
What To Look For:
The stand should be steady and located in the center of the
pan.
CAUTION!
Always
use sharp objects such as knives or scissors with adult
supervision only! Hold any sharp point away from
your body, particularly your eyes.
CAUTION! Always be careful to
follow all safety precautions when using fire, and use
with adult supervision only! Keep your alcohol lamp
or candle in an aluminum pie pan, and keep the flame at
least three feet away from anything that can burn, unless
otherwise instructed.
The small tripod described in the last experiment may be
used for most experiments, but with a little more wire mesh,
you can make a stand which is much steadier and which will
support more weight.
Materials Needed:
Home canning jar ring; wire screen or mesh (metal only);
alcohol lamp or candle with safety pan; matches.
Procedure: Have an
adult help you to cut a rectangular piece of wire mesh about
9 cm (3 ½ in) by 22 cm (8 ½ in). IMPORTANT! If
your alcohol lamp is a bit larger, you can cut the width of
the wire so that the lamp fits underneath with about 3 cm (1
in) to spare. If you are using a candle, you will need to
get an adult to cut the candle so that it will fit
underneath with about 3 cm (1 in) to spare.
When the wire mesh is rolled up on the long side, it should
fit snugly inside the canning ring as shown. Bend the
wire ends around each other to hold the wire in place so
that it fits snugly under the ring. Also, be careful to bend
the wire ends under so that they won't scratch you later.
Cut another piece about 9 cm (3 ½ in) square.
Place the mesh cylinder and jar ring over your candle or
alcohol lamp and light. Then place the square piece on
top. Your improved stand is now ready to use.
What To Look For:
Like the tripod, this stand should be steady and located in
the center of the pie pan. However, this one is
a little more secure than the tripod.
Now that you have learned a bit about fire
safety, check out some of the great experiments on this site!