1. Performance Test Review June 2012

2. General overview of the test • Three stations • 9 minutes per station • ALL materials supplied by teacher including pencils, ESRT pages, calculators, etc. • DO NOT be late for class on the day of your test! • The test will be given in ________________________ • Leave ALL belongings outside the room • You may only come in with a pen or pencil (no other items are allowed)

3. General advice • Study these notes before the test! • Make sure to read CAREFULLY all directions on the test • Be careful to round numbers according to the directions tenths place  one decimal like 0.2 or 1.6 • Write down your station code numbers as soon as you sit-down at your station • Do not talk during test! • Don’t be nervous, you have seen all this before!

4. Specific stations on the test • Station #1: Rocks and minerals • Station #2: Ellipses • Station #3: Earthquake epicenter

5. Station #1: Rocks and minerals (see Mineral PowerPoint for details) • TASKS: (1) Determine the identity of a mineral based on a set of characteristics that you find. You will use a flow chart for this. (2) Determine the identity of a rock based on a set of characteristics that you find. You will use a flow chart for this. • Minerals: Naturally occurring, crystalline solids with well-defined chemical and physical properties

6. Ways to identify minerals • Hardness (1-10) • Cleavage or fracture • Streak test • Crystal shape • Acid test • Density (specific gravity) • Taste

7. Cleavage • Results from weaknesses in atomic structure

8. Fracture • Uneven breakage within minerals

9. Streak test Streak color Streak plate

10. Hardness test • Harder or softer than glass • If mineral scratches glass, then object is harder than glass • If does not leave a scratch on the glass, then object is softer than glass

11. Rocks • Rocks: Composed of two or more minerals (not pure substances) • Three kinds of rocks 1) Igneous: cooling and solidification of magma or lava 2) Sedimentary: compaction and cementation of sediment 3) Metamorphic: changes in heat and pressure

12. Igneous rocks granite All have interlocking crystals except obsidian which has glassy texture.

13. Sedimentary rocks Conglomerate Sandstone All are fragmental (clastic) and/or contain fossils. limestone

14. Metamorphic rocks Gneiss showing banding (type of foliation) Slate showing foliation

15. Station #2 Ellipses (see Ellipse notes for more details) • TASK: Draw an ellipse and determine the eccentricity • Ellipse: A circle that has been stretched-out (oval) • Formula: e = d/L DEMO • http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=35689164  

16. Station #3: Earthquake epicenter (see Earthquake notes for more details) • TASK: Determine the position of an earthquake epicenter DEMO • http://vids.myspace.com/index.cfm?fuseaction=vids.individual&videoid=57489815