1. 10/2/08 Sorting Rocks Lesson #21 Quick Write: Yesterday you observed and recorded various rock properties (characteristics). Today you will be sorting rocks into groups.  List rock properties you could use for the sort. Announcements: Quiz corrections due TODAY. Retakes Friday at lunch. Diagrams can be edited and turned back in for additional credit Scientist reports will be due October 14 th

2. 10/2/08 Sorting Rocks Lesson #21 Rock Sort: Work on either the Nankoweap rocks or the North Canyon rocks. How are some alike and different? Sort the rocks from the North Canyon and the rocks from the Nankoweap Canyon. Give the groups names!

3. 10/2/08 Sorting Rocks Lesson #21 North Canyon sorted by ________________ rocks #__, #__#__, #__, #__ #__, #__#__, #__, #__ North Canyon sorted by ________ ________ rocks Sort the rocks from the North Canyon and the rocks from the Nankoweap Canyon. Only use one group at a time.

4. 10/2/08 Sorting Rocks Lesson #21 Lab Safety -Follow directions -Proper and careful use of materials -Safety equipment Recall eyewash demonstration -Keep materials away from your face We are working with dilute hydrochloric acid, HCl HCl is dangerous if in contact with eyes or ingested -Wear goggles -Gently use a small amount -Never point bottle at anyone -Clean up carefully -WASH HANDS, then remove goggles

5. 10/2/08 Sorting Rocks Lesson #21 -Demonstration of acid test Rocks on paper towel (numbers down) Gently wipe off an area on the rock Gently put one drop of acid on a rock Observe and record on yesterday’s table or as shown: Acid test observations for ________ canyon rocks #__: _______________ Dry the rocks and table. Wash hands, return goggles

6. 10/2/08 Sorting Rocks Lesson #21 TASK: -Perform acid test and record observations -Clean up & wash hands -Remove goggles and place in box -Sort rocks with new information ~see example chart on the board Lab Safety -Follow directions -Proper and careful use of materials -Safety equipment -Keep materials away from your face Working with acid -Wear goggles -Gently use a small amount -Never point bottle at anyone -Clean up carefully -WASH HANDS, then remove goggles

7. The acid test Which rocks fizzed? Did these rocks share other properties? 10/2/08 Sorting Rocks Lesson #21

8. Calcite The material in the rock that reacted with the acid was calcite. Calcite is composed of Calcium Carbon and Oxygen. CaCO3. When acid reacts with calcite a gas is given off, hence fizzing. 10/2/08 Sorting Rocks Lesson #21

9. Did you see a gas? What was it? 10/2/08 Sorting Rocks Lesson #21

10. Limestone This is the name given to rocks containing calcite. Calcite reacts with the acid and gives off a gas 10/2/08 Sorting Rocks Lesson #21

11. Sandstone This is the name given to rocks that are made out of particles of sand, cemented together. What characteristics do these rocks have? 10/2/08 Sorting Rocks Lesson #21

12. Shale Which rock # has not been mentioned? Shale is a fine grained rock that has splintery layers. Acid sits on the rock with no reaction. Plant fossils 10/2/08 Sorting Rocks Lesson #21

13. Naming the rocks Limestone Sandstone Shale 10/2/08 Sorting Rocks Lesson #21