Concept TEKS 6.14
the rock cycle and K.10, 1.10, 2.10, GMO.7
Process TEKS 6.2
and interpret information to construct reasonable explanations from direct
and indirect evidence
Materials for each
group of students
Texas Rock Kit
(available for $2 each from Bureau of Economic Geology Publications)
and look at the virtual
Print out the
rock cycle puzzle
on stiff paper and cut out the pieces along dashed lines
Map of Texas
Rocks and Minerals"
- Rock and mineral
collectors enjoy collecting and classifying beautiful and interesting
rocks. In this lab we will go beyond classifying to use the rocks the
same way that geologists use them, as clues to what happened in the
past. Think about solving a mystery where you make observations,
do analyses, and draw conclusions. Number your samples
to match the numbers in the compartments in the tray that they come
in. Calcite, quartz, and feldspar are minerals; put them aside for now.
Spread out your rocks and observe as many properties as you can.
- Compare what you
observed to what other groups observed and merge everyones observations.
- List as many processes
that change the earths surface as you can think of. Take out your
puzzle and find the pieces that name processes. If you dont know
the terms, look them up in "Texas Rocks and Minerals" or another
Do any of your observations indicate what processes formed the rock
samples? Put rocks on the puzzle pieces that they represent. For some
rocks you need information that cannot be obtained by looking at your
small sample. For these rocks, you should do further analysis, by reading,
by doing other experiments, or by consulting information in the virtual
rock kit. You might compare the rocks and minerals and look
- Use the results
of your analysis to put the puzzle together to come to conclusions.
Discuss and defend your conclusions.
- Use the page sized
Geologic Map of Texas to determine what kinds of rocks are found in
your area. Read the back of the map to find out what happened in the
past in your area.
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