1. I’m pumped for this part of the Regents!
Lab Practical Part D
I’m pumped for this part of the Regents!
Regents Earth Science

2. When? : You are to report directly to the library.
If you are taking the lab practical 1st period, you might be up to 10 minutes late to your next class.

3. Some Simple Rules Be ON TIME Do not be absent! Pen AND Pencil!
READ DIRECTIONS
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 this part

4. What is the Lab Practical?
First part of the Regents Exam (actually is Part D)
Test divided into 3 stations
Students are given 9 minutes per station

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

6. Mineral Properties Luster Cleavage or Fracture Streak Hardness
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

7. Luster?
Cleavage?
Streak?
Hardness?
Mineral Name?
Luster?
Cleavage?
Streak?
Hardness?
Mineral Name?

8. Luster ?

12. Cleavage or Fracture ?

16. Rock Properties and Classification
Classify 2 different rock samples
Sedimentary, Igneous, Metamorphic
State a reason for your classification

17. Igneous Rocks
Basalt
Obsidian
Pumice
Granite

18. Igneous Rocks: Crystalline texture
Intrusive and contains coarse crystals
Glassy texture
gas pores or spaces (vesicular)

20. Sedimentary Rocks
Horizontal layering
of sediments
Limestone
Fossil

21. Sedimentary Rocks: Horizontal layering of sediments
Clasts, fragments or sediments cemented together.
Fossils
Contain fragments of other rocks cemented/compacted together.

23. Metamorphic Rocks
Quartzite
Gneiss
Slate
Schist

24. Metamorphic Rocks:
Interconnected mineral crystals WITH layering (foliation)
Shows mineral banding
Distorted or wavy rock structure

26. One observable characteristic?
Rock Type?
One observable characteristic?

35. 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

37. Rules to Follow 1. Figure out P-wave and S-wave arrival times
2. Subtract (S-time P-time)
3. Take the difference, go to page 11, do the “paper trick”
4. Read down chart to find the epicenter distance
5. Use epicenter distance to draw circle, using compass
6. Where the THREE CIRCLES meet is the epicenter

38. Time difference= 6 minutes

39. Using the seismogram (on the previous
page) you determined that P & S waves
arrived at a seismic station 6 minutes
apart.
Place your paper along the vertical axis
(time) and make small and accurate
marks at time 0 and time 6. Remember
to keep most of the paper hanging down
below the graph.

40. Now slide your paper until one
mark is on the S wave line and the
other is on the P wave line. Be
absolutely sure that your paper
is straight (vertical).
Read the distance at the point
where the edge of the paper
crosses the bottom (distance)
axis.
Remember that each small box is
200 km. The answer is
4400 km!

42. One more thing you need to do!
Time of origin of earthquake
A seismic station is 4000km from the epicenter of an earthquake. P waves arrive at the station at 2:48:00 PM. At what time did the earthquake occur?

43. First, use the distance to find the P wave travel time.
OK, the P waves took 7 minutes to
travel the 4000km distance.
If they arrived at 2:48:00 and the
trip took 7 minutes, they must have
started out 7 minutes before 2:48 PM
So subtract. 2:48:00
:00
Origin time: 2:41:00 PM

44. 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.

46. Measure to the nearest tenth! 0.1
Calculate e to the nearest thousandth!

48. Be sure to Read & Measure ACCURATELY
Remember: NO TALKING
Be on time!
Do not be absent!