U Rock
Title: Purpose:
Classification. Which is Which?

To determine the classification of different Rocks.
2 igneous rocks
3 sedimentary rocks 
2 metamorphic rocks
Materials: 
Magnification lens
7 Rock Samples
1 Identification Sheet
1)
2)
3)
4)
5)
Procedure:
	
	Look at the 7 rock samples labeled A through G. Observe them up close through the lens. 	Copy the data table on your own sheet .
Using the han9 lens, examine each rock for clues that show the rock formed from molten material. Record the rock's color and texture. Observe if there are any crystals or grains in the rock.
Use the hand lens to look for clues that show the rock formed from particles of other rocks. Observe the texture of the rock to see if it has any tiny, well-rounded grains.

Use the hand lens to look for clues that show the rock formed under heat and pressure. Observe if the rock has a flat layer of crystals or shows colored bands.

Weigh them to find their masses. They are all roughly the same size, so their relative densities can also be compared. One is so light that often this type of rock can actually float!
Use the identification chart given, to classify each rock. Record your observations in the data table.
6)
Write a 4 paragraph conclusion.
First paragraph: Purpose and Hypothesis. Which did you think was Metamorphic? Igneous? Sedimentary?
Second paragraph: Include background information about the three main types of rocks, as well as how to classify the different Igneous rock types. 
Third paragraph: What is the procedure for classifying rocks? What did you discover- especially unusual properties?
Fourth: Source of errors, what similar labs could be done?