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Regents Exam

Practice identifying minerals and rocks based on tests, such as luster, cleavage, streak, and hardness. Determine rock type (igneous, metamorphic, sedimentary) by characteristics. Review epicenter distance calculation and Kepler's first law in this exam review station. Remember key information from the Earth Science Reference Tables. Follow directions carefully to succeed on the Regents Exam. Good luck and aim to pass to enjoy summertime campfires!

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Regents Exam

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  1. Regents Exam Lab Practical Review

  2. Station 1 Mineral and Rock Identification • Identify 1 mineral based on identification tests and using a flow chart.

  3. Remember the Following tests: • Luster- is it metallic or non–metallic? • look for a reflection or metal look • off the surface for a metallic luster. Note-a glassy, surface reflection is not the same as a metallic look reflection. Metallic Non-metallic

  4. Mineral tests cont. 2.Cleavage or fracture- Cleavage will show a flat surface (sliced bread) Fracture will show a rough surface (ripped bread) Cleavage Fracture

  5. Mineral tests continued: 3. Streak- Using a small white plate, hold the mineral in one hand and make one “swipe” across the plate….then wipe one finger over the powder….That color on your finger is the streak. Do you see a color or is it colorless? .

  6. Mineral tests….last one! 4. Hardness Test-Moh’s Scale Using a glass plate you will try to scratch the plate using the mineral. Does it scratch the glass plate or not?

  7. Station 1 Rock Classification • By viewing a rock sample you will determine if the rock is igneous, metamorphic or sedimentary. • Then you must write a FULL sentence explaining why you thought the rock was igneous, metamorphic or sedimentary

  8. Igneous- Intergrown crystals-look for connected crystals with no space Bubbles-air bubbles like a sponge Glassy texture-very dark w/ concoidal fracture.

  9. Sedimentary- Layers-from sediments being deposited. Visible sediments-large pieces of broken rock visible in the rock. Fossils-impressions or pieces of a preserved really old organism.

  10. Metamorphic- Distorted layers- layers that are twisty and banded. Visible flakes-Look for flakes of Mica which makes it look shiny.

  11. Station 1 Continued Once you determine which rock specimen you have in front of you… write a full sentence. Capital letter to start…period at the end. This sentence must explain why you think the rock specimen meets that criteria. Use terminology from the ESRT!

  12. Station 2-Epicenter Let’s practice how to find Epicenter distance- P wave arrival- 12:01:30 S wave arrival- 12:06:30 Difference between both the P and S wave? 5 minutes-use the chart-

  13. 1. Measure the paper on the side at 5 min. 2. Slide up until the marks on your paper match the P & S wave lines 3. Then follow the line down to the distance number.

  14. Plotting three epicenter distances to find the location:

  15. Station 2 cont. Difference between P & S wave= 3 min. P wave arrival- 9hrs 24 min. 00 sec. S wave arrival- 9hrs 27 min 00sec.

  16. Drawing Epicenter direction:

  17. Station 3- Keplers 1st Law! Di Distance between foci Major Axis from both sides j

  18. Station 3 Continued: To review the procedure to finding the eccentricity of an ellipse: • Place pins in coordinating letters given in your instructions. • *remember one of these will count as the foci of the sun! 2. Place the provided string around both pins, and using your pen you will draw the ellipse determined by the distance of the foci. 3. Note where the sun is closest to the planet in orbit….do you remember something about orbital speed? 4. Using the ESRT do the formula with your foci distance and axis length-then find the eccentricity of this object. 5. Using the ESRT notice the planets listed and your calculated eccentricity….

  19. 6. Remember…… • 0 foci distance will give you a perfect • circle-this means one foci. • 1.0 eccentricity will give you a straight • line (the further apart the foci • the more eccentric the oval will be. • Mercury is a most eccentric orbit and • Venus is a least eccentric orbit. • Earth is a slightly eccentric ellipse.

  20. Last minute instructions!! • Read the station directions carefully • Always note your code numbers, on your answer sheet!!!! • If it says to label your answer, then do it. • If it says to round to the nearest tenth, hundredth, etc., do it. • Write full sentences when noted!

  21. Good Luck! Pass the Regents and you too can enjoy campfires this summer and not summer school!!!!

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