Making Sedimentary Rocks
AIM:
To investigate the process of cementation in the production of sedimentary rocks.
HYPOTHESIS: As you include more
turn out stronger/weaker.
, the rocks will
EQUIPMENT:
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Students are provided with
Polystyrene cups (6)
Pop sticks (6)
Teaspoons
Gravel
Sand
Plaster of Paris
Measuring Cylinder
PROCEDURE:
1. Measure out a number of teaspoons of gravel, sand, plaster of Paris
and water into a polystyrene cup.
2. Record the mixture you made in the table below.
Trial Teaspoons of
Teaspoons of
Teaspoons of
Teaspoons of
gravel
sand
plaster of
water.
Paris
1
2
3
4
5
6
3. Stir the mixture with the pop stick and leave the pop stick in while
you set aside the cup for the mixture to cure.
4. Repeat for five different combinations of the ingredients.
Student design
1. Decide on a test that you could make to see how strong your rock is.
2. The test must be graduated – you should start with a low strength
version of the test and work your way up to a higher strength test.
3. These are the steps for my Test
1.
2.
3.
4.
This is my damage scale so that I can rate the damage done.
Results:
Trial Description of
rock
Describe the graduated versions of your test here
1
2
3
4
5
6
Conclusion:
1. Was your hypothesis supported? State evidence.
2. List your rocks in order strongest to weakest
3. What did you learn about cementing of sedimentary rocks?
Assessment Rubric - Making sedimentary rocks
Read carefully, yes this means you too.
Practical Skills
A
As B with
thoughtful and
considered
Designing an
investigation
As B with
As B with
comments about innovative and
results.
creative
B
As C with tidy,
carefully,
organised.
As C with
detailed and
clear.
D
I carried out
some of the
practical
E
I attempted to
carry out the
practical
I recorded data
for some parts
of the
investigation
I attempted to
record data
C
Recording data
As C with
detailed and
clear including
damage scale
I safely carried I recorded data I designed a
out the
for all parts of test for the
practicals as
the
rocks.
written.
investigation
I used
another’s
design
I attempted to
use a design
Analysing
Results
As B with
identified
further
study
As C with
accurate and
well
supported
I was able to
write a
mostly
accurate
conclusion.
I wrote a
partly
accurate
conclusion
I attempted
to write a
conclusion