Carbonate Connection Unit
published on: 2/13/2005
Contributing Teacher(s): Mark Mason
Science/Earth Grade Range: Middle Grades (6-8) Materials Needed:
Grade Range: Middle Grades (6-8)
- Goal 1.3 design and conduct field and laboratory investigations to study nature and society
- Goal 1.6 discover and evaluate patterns and relationships in information, ideas and structures
- Science 5. Processes (such as plate movement, water cycle, air flow) and interactions of earth’s biosphere, atmos...
- Science 7. Processes of scientific inquiry (such as formulating and testing hypotheses)
Time Allowance: About 7 class periods of 50 minutes
Description: Use the Hydrochloric Acid test for Carbon Dioxide fizzing to determine if each of the 90 different materials are, or are not carbonates such as limestone.
Steps a teacher needs to implement this idea:
A teacher will need to go to considerable efforts to gather the materials needed for the testing (your list of materials to test could be different from mine and still give a nice variety of materials to test). Students will benefit from some previous experience with the HCl test, possibly using a few obvious positive samples like limestone and calcite, a few obvious negative samples like granite and chert, and the difficult positive test like dolomite (fizzes only if you work up some powder). Of course, laboratory safety and cooperation are important in developing any type of laboratory lessons. Once the organization for the testing (grouping, procedures, etc.) is established plan on a full 50 minute class period for the students to do the predicting and the testing for each round. My suggestion is to follow each round of testing with a class period for discussion of the previous rounds results and to do the assignments.
Accommodations for students with diverse learning needs:
Students who have trouble focusing on the lab work should be grouped with partners who can help them to be successful. Otherwise, a less involved set of lessons with fewer tests or with teacher involved demonstrations may be needed.
Carbonates and Scientific Methods
Carbonates Testing Round I
Rocks and Minerals
Circle or box in red, all substances you predict to be carbonates.
Carefully test each substance with a drop of HCI (you must wear eye protection), fill in the chart.
Material Name Carbonate
Iron Ore (local) Cave Rock (local) Sullivan sandstone (local) Pseudo fossil (local) Creek gravel (local) Franklin Co. gravel (local) Hwy 30 fossils (local) Tiff (local) Collection sandstone Calcite Dover Cliffs Galena Geodes Travertine Badlands rock Idaho lava Volcanic landscaping rock Elephant rocks Utah Red rock Springfield, MO gravel Railroad bed gravel Coal Columbia, MO gravel NE, MO gravel Marble Calcareous Tufa Shale Brown sandstone Chert Trap rock TOTAL Yes = No = Correct Predictions =
Carbonates Testing Round I - Rocks and Minerals
Material Name Carbonate
Iron Ore (local) No >Cave Rock (local) Yes Sullivan sandstone (local) No Pseudo fossil (local) No Creek gravel (local) No Franklin Co. gravel (local) Yes Hwy 30 fossils (local) Yes Tiff (local) No Collection sandstone Yes Calcite Yes Dover Cliffs Yes Galena No >Geodes No Travertine Yes Badlands rock YesFor additional information contact :
Spring Bluff Elem.
Spring Bluff R-XV
Hosted by BrightTree