Lab Practical Lab Practical InformationInformation

Regents Earth Science

When?When?

• Wednesday 5/31/2011– Everyone

Where?Where?

• All classes report to room (here) as normal.

Some Simple Rules• Be ON TIMEON TIME• Do not be absent!Do not be absent!• Pen AND Pencil!Pen AND Pencil!• READ DIRECTIONSREAD DIRECTIONS

• There is to be absolutely NO TALKINGNO TALKING– If you choose to talk, your exam booklet will be taken

from you– You will receive a 00 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?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 Station 1: Mineral and Rock IdentificationIdentification

• Using a mineral identification kit, the student Using a mineral identification kit, the student will determine the properties of will determine the properties of aa mineral mineral and will use those properties to identify that and will use those properties to identify that mineral from a flowchart. Using rock mineral from a flowchart. Using rock identification charts from the identification charts from the Earth ScienceEarth Science Reference TablesReference Tables and the characteristics and the characteristics observed in observed in twotwo rock samples, the student rock samples, the student will classify each rock as igneous, will classify each rock as igneous, sedimentary, or metamorphic.sedimentary, or metamorphic.

Mineral PropertiesMineral 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 Rock Properties and ClassificationClassification

• Classify 2 different rock samples– Sedimentary, Igneous, Metamorphic

• State a reason for your classification

Igneous Rocks

Granite

Basalt

Pumice Obsidian

Igneous Rocks:

– Multiple-mineral composition– Crystalline texture– Interconnected mineral crystals with NO

layering– Glassy texture– Rounded gas pores or spaces

Sedimentary Rocks

Limestone

Layered sediments

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

Gneiss

Quartzite

Schist

Slate

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 P-wave 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

2:33:002:33:00 2:35:302:35:30

00:02:3000:02:302:35:30 – 2:33:00 =2:35:30 – 2:33:00 =

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

Measure to the nearest tenth! 0.1

Calculate e to the nearest thousandth! 0.001

Please Remember

e = 0 e = 1

Perfect circle

Straight line

Please Remember

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 ACCURATELYACCURATELY

• Remember: NO TALKING

• Be on time!

• Do not be absent!