Lab Practical Information Regents Earth Science When? • Wednesday 5/31/2011 –Everyone Where? • All classes report to room (here) as normal. Some Simple Rules • • • • Be ON TIME Do not be absent! Pen AND Pencil! READ DIRECTIONS • There is to be absolutely NO TALKING – If you choose to talk, your exam booklet will be taken from you – You will receive a 0 for the Regents grade – You will have to re-take the Regents Exam in August & possibly have to go to Summer School What is the Lab Practical? • First part of the Regents Exam • Test divided into 3 stations • Students are given 9 minutes per station Station 1: Mineral and Rock Identification • Using a mineral identification kit, the student will determine the properties of a mineral and will use those properties to identify that mineral from a flowchart. Using rock identification charts from the Earth Science Reference Tables and the characteristics observed in two rock samples, the student will classify each rock as igneous, sedimentary, or metamorphic. Mineral Properties • Luster – metallic or nonmetallic—glassy, dull, pearly • Cleavage or Fracture – are the broken sides of the mineral semi-smooth surfaces, or non-smooth broken surfaces? • Streak – using white streak plate to see color of powdered mineral • Hardness – using glass scratch plate • • • • • Luster? Cleavage? Streak? Hardness? Mineral Name? • • • • • Luster? Cleavage? Streak? Hardness? Mineral Name? Metallic Luster Rock Properties and Classification • Classify 2 different rock samples – Sedimentary, Igneous, Metamorphic • State a reason for your classification Igneous Rocks Basalt Pumice Granite Obsidian Igneous Rocks: – Multiple-mineral composition – Crystalline texture – Interconnected mineral crystals with NO layering – Glassy texture – Rounded gas pores or spaces Sedimentary Rocks Layered sediments Limestone Fossil Sedimentary Rocks: – Bedding or layering of sediments – Rounded grains, clasts, fragments or sediments – Fossils – Cemented sediments with visible pores or openings – Contain fragments of other rocks Metamorphic Rocks Quartzite Gneiss Slate Schist Metamorphic Rocks: – Multiple-mineral composition – Interconnected mineral crystals WITH layering (foliation) – Slaty, schistose or gneissic foliation – Distorted or wavy rock structure – Stretched pebbles – A high percent of mica minerals Station 2: Locating an Epicenter • Using seismic data, the Earthquake Pwave and S-wave Travel Time graph from the Earth Science Reference Tables, a safe drawing compass, and a map, the student will determine the location of an earthquake epicenter 2:33:00 2:35:30 – 2:33:00 = 2:35:30 00:02:30 Station 3: Constructing and Analyzing an Asteriod’s Elliptical Orbit •Using two pins, a looped string, a metric ruler, and a calculator, the student will construct an ellipse, determine its eccentricity, and apply this information to our solar system. Eccentricity A number indicating the roundness of an ellipse. Eccentricity = Distance Between Foci Length of Major Axis e=d/L Page 1 in your BEST FRIEND Please Remember Measure to the nearest tenth! 0.1 Calculate e to the nearest thousandth! 0.001 Please Remember Perfect circle Straight line e=0 e=1 Please Remember Planets change orbital speed as they revolve around the Sun. Please Remember • As distance from the Sun increases, a planet’s period of revolution increases. • Be sure to Read & Measure ACCURATELY • Remember: NO TALKING • Be on time! • Do not be absent!