Download Rocks and the Rock Cycle

Rocks and the Rock Cycle
Vocabulary
Rocks
Igneous
“Fire”
Sedimentary
Sediment are very
small pieces of rock,
sand, minerals, etc
Metamorphic
“Changed”
Igneous Rocks
Intrusive
Extrusive
(slow cooling of magma
underground)
(fast cooling of lava on the
Earth’s surface)
Large-grain texture
Fine grain texture
(you can easily see
different minerals in
the rock)
(the rock looks the
same all the way
through)
Igneous Rock
• Silica is a material found in magma
made from silicon and oxygen
• Lava low in silica forms dark-colored
rocks such as basalt
• Magma high in silica forms lightcolored rocks such as granite
Sedimentary Rock
• Shale, sandstone and conglomerate are
clastic rocks. Sandstone is used in
buildings
• Rock salt is chemical (evaporation)
• Coal and limestone are organic.
Limestone is used in buildings and to
make cement.
Sedimentary Rock
• Sediment
becoming
clastic
sedimentary
rock
Clastic Sedimentary Rock
Organic Sedimentary Rock
Metamorphic rock
Made through metamorphism:
changing on one type of rock
to another through heat and pressure
(without melting)
Metamorphic Rock
• Marble is non-foliated rock used for
flooring and statues. It can be easily
polished
• Slate is foliated rock and as such, splits
easily into flat pieces used in floors and
outdoor walkways,
Metamorphic Rock
• Granite (left) becomes gneiss (pronounced
“nice”, right) through heat and pressure.
Rocks
and
the
Rock
Cycle
The rock cycle describes how different kinds of rock are
related to one another and how rocks change from one
type to another. The rock cycle has no beginning or
end.
Classwork 1 – Rocks and Rock
Cycle
1. Three types of rocks and how they’re made
2. ____ are made of ____
3. Are metamorphic rocks formed by melting other
rock types? Explain
4. Compare the three types of sedimentary rock
5. Compare the two types of igneous rock
Copy the questions into your notebook (right-side) and answer them