Grade Science Fair Projects
Rock experiments make for engaging 6th grade science fair projects.
They provide a great way to learn about earth science as well they
find them very interesting. Below are some rock experiments suitable
for 6th grade science fair projects that are easy to do and easy
to explain but will still impress the judges!
Rocks are eroded in due to the different forces of nature This
includes rock slides, rain, sleet, and hail. The freezing and thawing
process also breaks down rocks. Water expands when it is frozen.
When water is absorbed by the rock, it will expand when frozen,
and this will cause cracking in the rock. Once the rock has been
through this process several times, parts of the rock will break
off entirely. To find out what happens and what kind of rocks are
most susceptible to break down, you can try this experiment.
- Many different types of rocks including granite, limestone,
- A non-glass, non-metallic container such as a plastic dish
What to Do:
Examine the different rocks closely. Which rocks do you think will
most easily break down after they have been frozen and thawed a
few times? Make your hypothesis and write it down. Fill the bottle
with water and put the rocks in the water. Put the bottle in the
freezer. Allow the water to thaw after it has been frozen. Once
the water has thawed, place the bottle once again into the freezer.
Do this three or four times.
Take the bottle out and examine the rocks carefully. Which one
has made the most change? Can you tell where small pieces of rock
have broken off due to the freezing process. Compare the results
to your hypothesis and see what differences there are. Explain these
differences. This happens to entire mountains during the freezing
and thawing process of nature!
Rocks can also erode when they contain carbonate compounds and they
come into contact with acidic chemicals. This can happen when rocks
are hit with acid rain. This experiment will use vinegar, which
is much stronger than acid rain.
Use a piece of limestone, which is made from calcium carbonate.
Put the limestone in a bowl, pour the vinegar over it and watch
what happens. When the vinegar reacts the limestone will fizz and
form bubbles. As it continues to react the vinegar will dissolve
You can also try this experiment with different types of acid including
lemon juice, coke, diluted lemon juice, and club soda.
Using this experiment, research how acid rain does the same thing
to rocks over time. How long does it take? Which types of rocks
are most affected?
This is one of many 6th grade science fair projects that will bring
parents, students and teachers together in an exciting and educational
Note: See the Disclaimer
before starting this project.