Science 8
Direction Sheet
Lab: Rock ID
Materials:
Rock sets, magnifying glass, glass bottle for testing.
Procedure:
1. Arrange the rocks by their numbers into 3 groups as shown on the chalkboard at the front of the lab.
2. Arrange the rocks on these sheets according to their properties. Have your teacher check your work.
Use the glass bottle for determining quartz or calcite by hardness.
3. When you are sure what a particular rock is, write its name and number on your paper.
Answer the questions for each section on your paper.
Rock Group I
TEXTURE
Light -----------COLOR----------- Dark
Granite
Gabbro
Coarse-grained
(Intrusive)
Rhyolite
Basalt
Fine-grained
(Extrusive)
-----------Obsidian----------Glassy
(Extrusive)
-----------Pumice----------Porous
(Extrusive)
1.
2.
2.
3.
4.
What group of rocks are these?
Which rock, granite or basalt, cooled faster?
How can you tell?
Why does obsidian have no crystals?
How does pumice form?
Compare coarse-grained and fine-grained igneous rocks. State some similarities and differences.
Rock Group II
TEXTURE
Fine ------------GRAIN SIZE -------Coarse
Slate
Schist
Gneiss
Foliated
Marble
Quartzite
calcite
quartz
Nonfoliated
1. What group of rocks are these?
2. How is granite similar to gneiss?
Rock Group III
Conglomerate
Sandstone
Shale
Clastic
pebbles
sand
Coal
clay
Limestone
Nonclastic - organic
plant remains
shells
Limestone
Nonclastic - chemical
calcite
1. What group of rocks are these?
2. How are sandstone and quartzite similar?
3. How are marble and limestone similar?
ROCKID.LAB
VERSION 3.3
6/15/2016