1. Minerals and Rocks Unit Week 17 Directions 1.Prepare your desk for science. Put your homework on top of your desk. 2.Use voice level 0 (no voice) to look at notebook pg. 48 and think about what four physical properties we can use to identify minerals. Which one do you think is the best one to use? Why?

2. Targets & Warm Up Targets: Students will use physical properties to identify minerals. Warm Up: Which physical property do you think is the best one to use to identify minerals? Why?

3. Homework Review

4. Minerals Minerals are natural, nonliving solid crystals that make up rocks To identify a mineral, scientists test some of its physical properties. A physical property is a characteristic of a substance that can be observed without changing the substance

5. How to Identify a Mineral Color Luster The way a mineral’s surface reflects light Streak The color of the powder of a mineral Hardness The mineral’s resistance to being scratched

6. Table of Contents DateTitlePage Minerals Experiment49, 50 Once you are finished with the Table of Contents, go to page 49, 50 and add the title and date to the top of the page.

7. Your task today You will use physical properties to identify minerals. To do this, you will… 1.Observe and record the mineral’s color and luster 2.Test and record the mineral’s streak and hardness 3.Compare your results to the Mineral Identification Table 4.Use your results and the information in the table to identify each mineral.

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10. Hardness How to test for hardness: – A fingernail has a hardness of 2. – A copper penny has a hardness of 3. – The paperclip has a hardness of 5. Scratched by a fingernail? Scratched by a penny? Scratched by a paperclip? Soft yes Medium noyes Hard no yes or no

11. Reflection Questions Compare your observations to the mineral identification chart. Which minerals do you think you can identify? Why?

12. Targets (Revisited) Targets: Students will use physical properties to identify minerals.

13. Homework SubjectHomeworkDue Date ScienceMinerals QuizWednesday

14. Physical vs. Chemical Properties To identify a mineral, scientists test some of its physical properties. A physical property is a characteristic of a substance that can be observed without changing the substance A chemical property is a characteristic of a material that become evident when the material undergoes a chemical reaction or chemical change.

15. The Acid Test What is the acid test? You can test minerals by putting a small amount of a acid on a mineral that you are trying to identify. Minerals that have calcium carbonate (CaCO 3 ) will react when an acid is added to it. Carbon dioxide (CO 2 ) is released and the mineral fizzes. What the acid test tells us If the mineral fizzes, then the mineral contains calcium carbonate. If the mineral does not fizz, then the mineral does not contain calcium carbonate.

16. The Acid Test Video Video 1: Acid test & granite rock (pink and white feldspar, gray quartz, and some black mica) Video 2: Acid test & calcite

17. The Acid Test Minerals that react to acid CaCO 3 = calcium carbonate

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