Sedimentary & Metamorphic Rock Identification Lab 2010
Your group will examine and attempt to classify 9 different rock samples through use of the provided key and observations of their grain size, color, texture and any other physical properties/features unique to that rock.
- Each of you will need to make a rough draft in your notebook of the Lab write up where you: rewrite the question; compose a hypothesis, list the materials used to classify the rocks and a data table. Teacher approval of Rd is needed before moving to #2
- You will conduct the lab with your table group. You may only examine one rock sample at a time. Observe and record the properties/features present in the rock. Repeat the process with each sample.
- If your group came prepared you should have time in class to discuss the analysis questions and conclusion. Answer the analysis questions and complete the conclusion for home work.
- The final draft of the lab should be completed individually using the rubric. The lab write up is worth 200 points. For correctly identifying the unknown 10th sample rock sample, I will award you 25 points.
Question: Which physical attribute will be most commonly used for classifying rock samples?
SEE list you used for the igneous rock lab
Hypothesis: Look at the attributes we are using for classifying the rock samples; use, your notes and prior experience at identifying rocks to hypothesize which attribute will help you to identify the largest number of samples. This is not a hypothesis, it is a hint.
Test: Rock samples will be classified by observing the following attributes: grain size, texture, color and any other physical properties. To determine the correct names for each rock sample rock identification keys, notes, and prior rock id experience will be used. The most useful attributes for classifying rocks may then be determined.
Materials: list everything you use to collect data
Procedures: Label this section on your final draft and write procedures and diagrams are needed for this lab, but list and briefly describe the methods of identification you are using and include diagrams
Create a data table with rows for each rock sample. Label the columns with sample #, the rock’s name, color, grain size, texture, other observable physical properties, and the feature that was most important to identifying the rock Be sure to include drawings and description of each of the rock samples as part of you observation journal.
Analysis: Make a graph and answer the questions
Graph: make a bar graph that illustrates which attribute was used the most when identifying the rock samples.
Analysis Questions: 1) Were there any samples that you found difficult to classify? Explain. 2) Which attributes were least useful for classification? 3) Classify each type of sedimentary rock into its sub-group and explain what allowed you to determine the sub group. 4) Same as question #3 for metamorphic rock 5) Give two reasons we are studying rocks?
Conclusion: Use the RUBRIC