Regents Exam Lab Practical Review

Station 1 Mineral Identification Identify 2 minerals by name based on identification tests

Station 2 Rock Classification Using charts, you will classify a rock as igneous, sedimentary or metamorphic in one or more complete sentences. Igneous Intergrown crystals Bubbles Glassy texture Sedimentary Layers Visible sediments Fossils Metamorphic Distorted layers Visible flakes

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 sun’s position and a fixed point on the dome.

6am 9am 12 noon 2pm 5pm 6am 9am 12 noon 2pm 5pm East South West North Sun moves at 15º per hour6am – 12pm = ? degrees 6 hours x 15 degrees/hour= 90degrees

6am 9am 12 noon 2pm 5pm 6am 9am 12 noon 2pm 5pm East South West North Sun moves at 15º per hour9am – 2pm = ? degrees 5 hours x 15 degrees/hour= 75 degrees

6am 9am 12 noon 2pm 5pm 6am 9am 12 noon 2pm 5pm East South West North Sun moves at 15º per hour9am – 12pm = ? degrees 3 hours x 15 degrees/hour= 45degrees

6am 9am 12 noon 2pm 5pm 6am 9am 12 noon 2pm 5pm East South West North

5. 9 cm

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.

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. Three times for each size will be measured and averaged.

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.

And what about at 2.5? 3.2 seconds And what about at 6? 1.6 seconds centimeters seconds

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.

Grams = g Centimeters = cm Degrees = º or degrees Seconds = sec Cubic centimeters = cm 3 Grams per cubic centimeter = g/cm 3

0: seconds Rounded to the nearest tenth: 7.6 sec Rounded to the nearest hundredth: 7.58 sec

0: seconds Rounded to the nearest tenth: 4.0 sec Rounded to the nearest hundredth: 4.00 sec Not rounded- totally wrong: 4 sec