Classifying Rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
100
What do geologist observe when studying a rock sample?
What is the rock's mineral composition, color, and texture?
100
Origin, texture, and mineral composition. Igneous rocks are classified according to their ___?___.
What is origin, texture, and mineral composition?
100
Sediment is the small, solid pieces of material that come from rocks or living things.
What is sediment?
100
Heat and pressure
___?___ and ___?___ deep beneath the Earth's surface can change any rock into a metamorphic rock.
200
About how many minerals make up the rocks on earth's crust?
What is 20?
200
What are the two types of igneous rocks?
What is extrusive and intrusive?
200
Cementation
_____?_____, is the proess in which dissolved minerals crystallize and glue particles of sediment together.
300
What are the minerals that make up the Earth's crust called?
What are rock forming minerals?
300
Rapidly cooling lava forms ____?____ grained igneous rocks with ____?____ crystals.
1. fine 2. small
300
Clasic, organic, and chemical
What are the three major groups of sedimentary rock?
300
Slate
What is one common foliated rock?
400
What do geologist observe in a rock to identify what type of minerals the rock contains?
What is the shape and color of the crystals in the rock?
400
Intrusive What type of igneous rock has larger crystals? Extrusive or intrusive?
What is intrusive?
400
Rock fragments with rounded edges make up conglomerate.
What makes up conglomerate?
400
1. sedimentary 2. metamorphic
Heat and pressure changes sandstone,a ____?_____ rock, into quartzite,a ____?_____ rock.
500
What do geologist put on the surface of a rock to test if the rock is made out of compounds called carbonates?
What is acid?
500
_____?_____ rocks have a fine grained or glassy texture.
What is extrusive?
500
Rock salt
What rock can form when seas or lakes evaporate?
500
Marble and slate.
What are the two most useful metamorphic rocks?
M
e
n
u