Science Fair Projects
Choose a Topic
Pick a topic that:
 Will be interesting.
 You will be able to complete in the required
( See handout for timeline.)
 Choose a title that reflects your topic and is
in the form a question
Example: How does caffeine affect the growth
of a plant?
 Write 1 to 3 sentences describing what you
want to find out in this project.
Example: The purpose of this project is to find
out if a pea plant will grow taller when given
caffeine rather than water.
 Research should be designed to get background
information about your topic, before you begin
your experiment.
 Develop 3 questions that you want to answer about
your topic.
 Try to use various sources for your research.
 Suggested sources:
Make your guess
Use your research to make an educated guess about
how you think your experiment will turn out.
Use the “ If I __________ then I think
Example: If I pour 100ml of coffee on four pea plants and pour
100ml of water in another four pea plants, then I think the
plants with coffee will grow taller because caffeine will
stimulate the plants.
 Design your experiment
Design your experiment so that they only test for one thing.
 Make sure that you do the same things to all groups of objects being
Example: If you are testing plants:
 Use the same seeds.
 Plant all of them with the same soil.
 Put them all in the same amount of light for the same amount of
 The only thing that should be different about the plants is that one
received coffee and the other water.
 To increase the validity of your experiment
Make sure to keep a control group.
Keep in mind sample size.
The more objects in your sample the more valid your
Use multiple trials. (At least three.)
 Write down step-by-step directions on how
to do your experiment.
Do not leave anything out!
Get 8 pea plants ( 100 cm tall).
Place 4 pea plants on each tray.
Label one set of plants “Caffeine”.
Label the second set “Water”.
Pour 100ml of coffee( with caffeine ) onto the soil of each
plant twice a week.
Pour 100ml of water onto the soil of each plant twice a
Measure each plant with a metric ruler
Record data in record book.
Make a complete list of everything
you will use in your experiment.
Tell how many and how much of
each object used.
Use metric measures only.
Do your experiment.
Have fun !
Make Charts and Graphs
 Display data using charts, tables, and graphs.
 Use the Graph Club or Inspiration program.
 Choose the correct graphs for your data.
 Using your data write a few sentences how your
experiment turned out.
From reading my charts and graphs, I know that
Plant Group #1 grew an average of 40cm with
100ml of coffee. Plant Group #2 grew and average
of 20cm with 100ml of water. The Plant Group that
was given coffee grew 20cm more on the average
than the Plant Group that was given water.
 Write down why you think your experiment turned
out the way it did, include if your hypothesis was
supported or not.
Be sure to use the term “ My hypothesis was/was not
Do not say I was right/wrong.
Even when your hypothesis was not supported you gain
information about your topic.
Use scientific reasoning for conclusion.
 Example:
My hypothesis was supported. The plants that
were watered with coffee ( caffeine ) grew taller
than those that were given water. Therefore,
caffeine has a positive effect on the growth of
pea plants. This may be due the fact that
caffeine is a stimulant. The caffeine could have
stimulated the plant to grow.
Future Considerations
 Tell what variable you would change if you
could do the experiment again.
 Tell how you might take your experiment to
the next step.
Future Considerations
If I could do this experiment again , the variable I
would change would be the amount of caffeine I would
place in each plant group. I would use 50ml for plant
group #1, 100ml for plant group #2, and 150ml for plant
group #3. I would also have three “control groups” of
plants. One would get 50ml of water. One would get
100ml of water. And one would get 150ml of water. I
want to see which amount of caffeine helps plants grow
the tallest.
Make Your Board
 Start your information on the top left panel of
the board, move down the left panel, across
the middle panel, and from the top down on
the right panel.
 Place pictures of your experiment on your
Make your Board
Helpful Resources
Science Fair Web Pages
Best site for help through out project!
This is a good site explaining the parts of a
science fair project.
A web site for children to use in setting up
their science fair project
A great site! It has info for parents, teachers,
and students. It has project ideas, research
tools, and tip sheets for all kinds of
Bringing It Together
Keys for success:
†Make a time-line and stick to it.
†Parental support

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