Download Inside Earth 5-1 worksheets 2013

Inside Earth
Ch. 5
5-1 Classifying Rocks (pp. 146-149)
Rocks
∆ How Geologists Classify Rocks (pp. 146-147)
Earth’s crust is made of r______________.
Rocks are made of mixtures of m____________ and other
materials.
Granite is actually made up of
◊ Q______________,
◊ Feldspar
◊ M________
◊ hornblende
Geologists observe a rock’s c_________ and texture to
determine its mineral composition (that means, what
minerals make up the rock).
Then geologists can classify a rock according to its origin, or
where and how it formed.
Why do geologists break open a sample of rock to look at
the inside surfaces? ______________________________________
__________________________________________________________
∆ Texture (pp. 147-148)
T________________ – the look and feel of the rock’s surface.
Ex. Smooth, glassy, rough, chalky
Grains – small particles of minerals or other rocks
Geologists study:
◊ Grain size
◊ Grain shape
◊ Grain pattern
◊ No visible grain
A rock’s grains give the rock its t_________________.
Some rocks have large grains like diorite. Other rocks like
sl________ have very fine grains.
◊ The shape of a rock’s c_____________ determines the
grain shape of a rock like granite.
◊ The shape of f____________ of other rocks determines the
grain shape of a rock like conglomerate.
◊ Describe the grain pattern in gneiss.
______________________________________________________.
◊ Do all rocks have visible grains? ________________________
◊ Some rocks without crystal grains cooled very q_________.
∆ Mineral Composition (p. 149)
How do geologists determine which minerals make up a
rock? ____________________________________________________
__________________________________________________________
__________________________________________________________
The rock must be sliced very, very thin so that l__________
can shine through its crystals.
∆ Origin (p. 149)
Origin (how or where rocks are formed):
depends on the 3 major groups of rocks:
I___________________,
S______________________, and
M___________________
Igneous Rocks – how do they
form?
_________________________________
_________________________________
_________________________________
_________________________________
Sedimentary Rocks – how do they form?
Metamorphic Rocks – how do they form?
_________________________________________
Have a gneiss day 