Regents Exam

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Regents Exam

• Lab Practical Review

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Station 1 Mineral Identification

• Identify 2 minerals by name based on
  identification tests

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Station 2 Rock Classification

• Using charts, you will classify a rock as
  igneous, sedimentary or metamorphic in one or
  more complete sentences.

Igneous Random Intergrown crystals Bubbles
gas pockets Glassy texture
Sedimentary Compacted and Cemented Layers Visible
sediments Fossils
Metamorphic Distorted layers Interconnected crysta
ls in a pattern Foliated
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Station 3 Angular Measurement

• Using a plastic hemisphere with the approximate
  path of the sun draw on it, you will locate the
  position of the sun at a given time.
• You will measure the distance between the suns
  position and a fixed point on the dome.

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Sun moves at 15º per hour
6am 12pm ? degrees
6 hours x 15 degrees/hour 90degrees
12 noon
2pm
9am
5pm
East
South
6am
West
5pm
6am
9am
12 noon
2pm
North
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Sun moves at 15º per hour
9am 2pm ? degrees
5 hours x 15 degrees/hour 75 degrees
12 noon
2pm
9am
5pm
East
South
6am
West
5pm
6am
9am
12 noon
2pm
North
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Sun moves at 15º per hour
9am 12pm ? degrees
3 hours x 15 degrees/hour 45degrees
12 noon
2pm
9am
5pm
East
South
6am
West
5pm
6am
9am
12 noon
2pm
North
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5.9 cm
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Station 4 Mass Density

• Using a scale, you will measure the mass of a
  mineral.
• You will be given the density of the sample.
• Using the mass you measured and the density given
  to you, you will calculate the volume of the
  sample.

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D m / v D m / v
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Station 5 Settling Time

• You will drop beads of three different sizes into
  a tube filled with a liquid and measure the time
  that it takes for the bead to settle.
• Two times for each size will be measured and
  averaged.

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057
053
092
185
078
103
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Averaging

• The 2 trials per bead can be measured to the
  nearest 1/100th of a second but the averages must
  be to the nearest 1/10th of a second
• Example 1.50 seconds
• 1.60 seconds
• 1.6 is the average

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Station 6 Graphing

• Using the data collected from station 5 (bead
  drop) you will graph three data points.
• Using the line drawn on the graph, you will
  determine the settling time for a theoretical
  bead of a given size.

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4
And what about at 2.5?
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seconds
3.2 seconds
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And what about at 6?
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1.6 seconds
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2
3
4
6
5
centimeters
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A note on rounding and labeling

• Read the station directions carefully
• If it says to label your answer, then do it.
• If it says to round to the nearest tenth,
  hundredth, etc., do it.

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• Grams g
• Centimeters cm
• Degrees º or degrees
• Seconds sec
• Cubic centimeters cm3
• Grams per cubic centimeter g/cm3

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7.58 seconds
Rounded to the nearest tenth
00158
7.6 sec
Rounded to the nearest hundredth
7.58 sec
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4.00 seconds
Rounded to the nearest tenth
00400
4.0 sec
Rounded to the nearest hundredth
4.00 sec
Not rounded- totally wrong
4 sec
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Good Luck!