Regents ExamLab 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.

IgneousIntergrown crystalsBubblesGlassy texture

SedimentaryLayersVisible sedimentsFossils

MetamorphicDistorted layersVisible 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

12noon 2pm

5pm

6am9am

12noon2pm

5pm

EastSouth

West

North

Sun moves at 15º per hour6am – 12pm = ? degrees

6 hours x 15 degrees/hour=90degrees

6am

9am

12noon 2pm

5pm

6am9am

12noon2pm

5pm

EastSouth

West

North

Sun moves at 15º per hour9am – 2pm = ? degrees

5 hours x 15 degrees/hour=75 degrees

6am

9am

12noon 2pm

5pm

6am9am

12noon2pm

5pm

EastSouth

West

North

Sun moves at 15º per hour9am – 12pm = ? degrees

3 hours x 15 degrees/hour=45degrees

6am

9am

12noon 2pm

5pm

6am9am

12noon2pm

5pm

EastSouth

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.

v

mD

d

mV

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.

185078057103053092

147051169091056080

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.

1 2 3 4 65

1

2

3

4And what about at 2.5?

3.2 seconds

And what about at 6?

1.6 seconds

centimeters

seco

nd

s

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 = cm3

• Grams per cubic centimeter = g/cm3

0:0158

7.58 seconds

Rounded to the nearest tenth:

7.6 secRounded to the nearest hundredth:

7.58 sec

0:0400

4.00 seconds

Rounded to the nearest tenth:

4.0 secRounded to the nearest hundredth:

4.00 secNot rounded- totally wrong:

4 sec