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Rocks and the Rock Cycle
Rocks
● Most common material on Earth
● Naturally occurring aggregates of one or more minerals
Three major families based on how they form:
Sedimentary
Metamorphic
Within each group there is a collection of rock types that differ from each other based
on size, shape, and arrangement of mineral grains
Igneous
“Types of Rocks: Rocks are not all the same:” ​View the following website and answer the questions within HW_
https://www.learner.org/interactives/rockcycle/types.html
Sedimentary Rock​: Ex. Conglomerate and limestone
1. What are sand, pebbles, and other fragments of materials collectively called?
2. How is sedimentary rock formed?
3. What are some common physical properties of sedimentary rock?
4. What are 4 things often contained in sedimentary rock? Sand, pebbles, stones and fossils
Metamorphic rock ​Ex. Gneiss and Marble
1. How is metamorphic rock formed?
2. What are some physical properties of Metamorphic rock?
Igneous Rock​ ​Ex. Basalt and Obsidian
1. What is the name of the molten rock deep within the earth that forms Igneous rock?
2. What are two ways Igneous rock is formed?
a.
b.
➢ What are some physical characteristics to look for in rocks that help with rock identification?
Fill-in the chart after practicing “types of Rocks” activity: continue to play the Identify rock Types until get 100 %
Type of Rock
Sedimentary
Metamorphic
Igneous
Physical identification
“How Rocks Change”​ ​View the following website and answer the questions within HW_
https://www.learner.org/interactives/rockcycle/change.html
“The way rocks change depends on various processes that are always taking place on and under the earth’s surface.”
Name Process that changes rocks:
Write How rock changes:
“The Rock Cycle Diagram” ​View the following website to complete the Rock Cycle Diagram
https://www.learner.org/interactives/rockcycle/diagram.html
Main idea that the rock cycle conveys: “rocks are continually changing from one type to another and back again, as forces inside the
earth bring them closer to the surface, forces around the earth’s surface move them about and then forces of the earth sink them back
down again.
Rock Cycle= Illustration to explain how 3 rock types are related to
each other and how Earth processes (along with other factors)
change a rock from one type to another through geologic time.
Note that one major “driving force” responsible for the recycling of
rock materials in the rock cycle is Plate tectonic movement