What is it that you are trying to find out from your experiment? What is it that you are trying to achieve?
research that other scientists have done. Read about techniques and
instruments that other scientists have used to study the process. Try to
understand the uses and limitations of the methods: the answer is only
as specific as the methods used to answer it. Think about the process.
Investigate what others have already learned about your question. Gather
information that will help you perform. your experiment.
thoroughly researched a topic, you should have some prediction about
what you think will happen in your experiment. This educated guess
concerning the outcome is called your hypothesis. You must state your
hypothesis in a way that you can readily measure, i.e., one that can be
answered with the techniques and instruments that you have available.
You must use methods that have been used before, or you must "validate"
your method (prove that it works).
4. 运用实验 验证假说
Now that you
have come up with a hypothesis, you need to develop a procedure for
testing whether it is true or false. This involves changing one variable
and measuring the impact that this change has on other variables.
When you are conducting your experiment, you need to make sure that you are only measuring the impact of a single change.
Design an objective experiment that keeps all the things that influence your answer constant, except the one you are testing.
Scientists run experiments more than once to verify that results are consistent.
Each time that you perform. your experiment is called a run or a trial.
stage, you want to be organizing and analyzing the data that you have
collected during the course of your experiment in order to summarize
what your experiment has shown you.
This is your
opportunity to explain the meaning of your results. Did your experiment
support your hypothesis? Does additional research need to be conducted?
How did your experiment address your initial question and purpose?
Since you are
performing an experiment for the science fair, you will write a report
and prepare a display board so that others can share in your
Describe your methods, make
a table of your results and graph them, and make conclusions based on
the evidence and assumptions that you state. It is very important to
list all your instruments, materials, methods, and references, so others
may duplicate your results.