I think that a lava lamp is a pretty decent
science project, as long as you go into the
science behind why the blobs of wax move up and
down. This type of thing is called "convective
heating / cooling" and is understood pretty well
by scientists (although modeling it using
equations or computers is sometimes difficult).
If you have a decent blurb on how/why it occurs,
then it is a decent project to conduct!
Also, if you're building a lava lamp
yourself, I advise you to be careful! Some of the
heating is pretty intense and some materials could
potentially catch on fire if they get too close to
the heating coils. Although if you don't build
your own lava-lamp, it's not nearly as interesting
or fun =P
It sounds like it would be a lot of fun to make a
lava lamp!But I don't think it's a good science
fair project on its own. A good science project
starts with a question. Here are some questions
that you might try to answer by experimenting with
your lava lamp.
How hot does the lava lamp
need to be for the blobs to move up and down? How
big are the blobs, and does this depends on the
size of the lamp or the temperature of the lamp?
Can you change the size of the blobs by using a
different kind of wax? What if you change the
liquid the blobs are floating in? What happens if
you use a different light bulb?
do science, we try to answer questions. Try to
come up with a few questions of your
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