Writing a good abstract for a project is really not
difficult. There are just some pointers to keep in mind, and
some pitfalls to avoid.
The important thing to remember is that the abstract
is the first contact that most people (including the judges) will
have with your project. Make it clear and to the point, avoiding
unnecessary detail, but including any important conclusions.
If
you could have written your abstract before starting the project,
it probably isn't sufficiently informative.
The attached samples may give you some ideas as to the appropriate style to use. The abstract is an important part of your project. Write it with care.
REMEMBER!----
Here are some samples drawn from recent abstracts submitted. We show the abstract as submitted, then make comments and show a revised version.
The subject of my experiment is acid precipitation
and its effects on the freshwater environment. I set up a control
tank and an experimental tank, adding drops of 6M nitric acid
to the latter to lower the water's pH. After four days the experimental
tank's water fell from a pH of 6 to 4. On each day, I took samples
from each tank and counted the number of Euglena, Closterium,
and Rotifer in a given area (1.5x0.5\ cm). This process was done
15 times for each tank on each day to insure accuracy. The average
of each of these 15 times was then substituted into a proportion
to approximate the population of the organisms in each tank. When
the experiment was completed, I had proved that by lowering the
pH of the water, the population of each organism I had observed
did decrease severely. |
This is a good abstract, but you'll note that there
is too much detail at some points. The concentration of the acid
or the number of times a reading was averaged is immaterial to
the issue of what the project is about. An improved version might
read as follows:
The subject of my experiment is acid precipitation
and its effects on the freshwater environment. The buildup of
acid rain in a body of fresh water was simulated by artificially
lowering the pH of an experimental water tank, and comparing the
population of various microbes in samples from that tank and from
a control tank which remained at a pH of 6. Populations of Euglena,
Closterium, and Rotifer were monitored as the pH of the experimental
tank was lowered to 4 over a period of four days. The results
show that all three populations were adversely affected by the
reduction in pH. |
The abstract might be further improved by a quantitative
statement of the results, such as, "Each of the three populations
decreased by at least 70% over the course of the experiment."
Example 2
The purpose of my research with Nitinol is to show
and/or find out if it is less expensive and more practical to
use in such things as machinery (Ball Bearings)and robotics (hot/cold
water systems). Nitinol is a shape memory
metal. When nitinol is heated it changes to the original and/or
programmed shape. I have constructed and designed a robotic hand,
using nitinol wires. The nitinol wires have been placed in the
fingers. When hot water is passed through the hand the wires curl
up and make the hand close. I feel this could be used in robotics
under a hot/cold water system. |
This example could benefit from less background and
more quantitative information as to the performance of the hand.
I have constructed and designed a robotic hand, using
wires of nitinol, a shape memory material which is activated by
heating. Nitinol wires in the fingers cause the hand to curl
up when hot water is passed through the hand. With
a water temperature of 75C, a finger movement of 5cm is obtained
for the model employed here (overall length: 16\ cm). |
Example 3
Cytochrome c oxidase is the last enzyme in the respiratory
chain, which uses oxygen to make water with the production of
energy. A fundamental principle of biology is that the structure
of a molecule is related to its function. This enzyme contains
two iron atoms and two copper atoms. Much of its biochemistry
is known. What is still unknown is the function of the copper
atoms.This project was undertaken to determine the roleof the
copper atoms. The copper absorption lies in the optical and infrared
regions. Using the variables of low temperature and selective
reduction, we can distinguish the contribution of each copper
atom. Copper contributions were observed during respiration and
these results showed that the copper atoms behaved the same as
in a purified cytochrome c oxidase preparation. One copper and
one iron atom are reduced together by the first two electrons,
then the other iron and copper atoms are reduced together by the
next two electrons. These four electrons reduce O2 to
2H2O. |
Again, a good abstract, but almost half of its length
is devoted to background information. The important point here
is to decide how much of this background is important to the understanding
of the point of the project. This is clearly
a subjective decision, and one person's answer might be the same
as another's. In this case, somewhat more might be appropriate,
although the version given above can certainly be condensed as
follows.
Cytochrome c oxidase is the last enzyme in the respiratory
chain, reducing O2 to 2H2O.
Although much of the biochemistry of this molecule is
understood, the function of its two copper ions remains obscure.
We have studied the optical absorption due to those ions. Our
first finding was that the contribution of each copper ion in
the pair is distinguishable in this spectrum. Observations during
respiration showed that the copper ion behavior is the same in
that case as in a purified preparation of cytochrome c oxidase.
The results show that one copper and one iron ion are reduced
together by a first pair of electrons, while a subsequent pair
reduce the remaining ions. |
Example 4
It is a recent theory that aspartame may actually
increase hunger, therefore being of no use to people trying to
control their weight. I hypothesize that aspartame inhibits the
production of the neurotransmitter serotonin, and thus increases
or maintains a subject's hunger, potentially causing a gain in
weight. I will attempt to prove this hypothesis by comparing the
weight gains of mice given 5\ ml of a .5% aspartame solution daily
with those of mice given 5\ ml of only tap water daily. The urine
will also be tested to determine whether aspartame is actually
blocking the production of serotonin to some extent and
thereby causing a weight gain. |
This abstract is written as a research plan. The
ideas are good, but what was actually done? The reader cannot
tell from this abstract. Putting in some information on the actual
project, we might obtain the following:
Recent research has suggested that aspartame, used
presently as an artificial sweetener, may actually increase hunger
sensations. I have tested this possibility by comparing weight
gains of mice receiving daily doses (25$mu$g) of aspartame with
those of mice receiving only a placebo dose. Both groups were
fed all they would eat. The results demonstrate conclusively (chi
square confidence level of 95%) that the aspartame increased the
weight gain of the experimental group by at least 15%. A concurrent
experiment was attempted to measure serotonin levels in the urine
of the two groups, since an effect on serotonin production is
one possible mechanism for the influence of aspartame. Results
of the latter experiment were inconclusive. |
Note that there is nothing wrong with identifying
an inconclusive result as just that! Not everything is going to
work.
Example 5
The purpose of this experiment is to verify the Gough-Joule
relationship, which expresses the effect of
temperature on a length of stretched rubber. The apparatus is
designed to run at two constant temperatures: that of cold tap
water and that of steam. From stress-strain measurements, the
relationship may be verified. While experimenting with two types
of rubber bands from Plymouth Co., I discovered that an inferior brand
in fact held up much better under these conditions than did a
"superior" American brand. |
This abstract fits most of our criteria. It gives
sufficient but not extensive background, describes what was done,
plus giving an interesting conclusion. The mention of Plymouth
Co. is probably unnecessary, and additional quantitative statements
as to what is meant by "much better" could be added.
All of the projects accompanying the above abstracts
have taken awards in past years. Nevertheless, there is always
room for improvement. The abstract is an important facet of your
project. You will have already invested considerable time in your
work toward your project. You should take the care to see that
that work is adequately reflected in the abstract you submit.