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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

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Lab practical information

Lab Practical Information

Regents Earth Science


  • Wednesday 5/31/2011

    • Everyone


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

Some simple rules
Some Simple Rules

  • Be ON TIME

  • Do not be absent!

  • Pen AND Pencil!


  • 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
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
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 ScienceReference Tables and the characteristics observed in two rock samples, the student will classify each rock as igneous, sedimentary, or metamorphic.

Mineral properties
Mineral Properties

  • Luster

    • metallic or nonmetallic—glassy, dull, pearly

  • Cleavageor 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





Mineral Name?





Mineral Name?

Rock properties and classification
Rock Properties and Classification

  • Classify 2 different rock samples

    • Sedimentary, Igneous, Metamorphic

  • State a reason for your classification

Igneous rocks
Igneous Rocks





Igneous rocks1
Igneous Rocks:

  • Multiple-mineral composition

  • Crystalline texture

  • Interconnected mineral crystals with NO layering

  • Glassy texture

  • Rounded gas pores or spaces

Sedimentary rocks
Sedimentary Rocks

Layered sediments



Sedimentary rocks1
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
Metamorphic Rocks





Metamorphic rocks1
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
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



2:35:30 – 2:33:00 =


Station 3 constructing and analyzing an asteriod s elliptical orbit
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 Elliptical Orbit

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 Elliptical Orbit

Measure to the nearest tenth! 0.1

Calculate e to the nearest thousandth! 0.001

Please Remember Elliptical Orbit

Perfect circle

Straight line

e = 1

e = 0

Please remember
Please Remember Elliptical Orbit

Planets change orbital speed as they revolve around the Sun.

Please remember1
Please Remember Elliptical Orbit

  • As distance from the Sun increases, a planet’s period of revolution increases.