Download Lesson 3 Its All About Rocks_Student

Its all about Rocks
Key Vocabulary
The Rock Cycle
Sediment
Sedimentary Rock
Metamorphic Rock
Igneous Rock
Magma
Metamorphosis
Melting
Heat and Pressure
The Rock Cycle.
Begin by copying the following image into your science notebook. This image
illustrates the basic cycle of Rocks.
Go on to the next Slide
Rock Cycle
Types of Rocks
Rocks are not all the same!
The three main types, or classes, of rock are sedimentary,
metamorphic, and igneous and the differences among them
have to do with how they are formed.
Sedimentary
Sedimentary rocks are formed from particles of sand, shells, pebbles, and other
fragments of material. Together, all these particles are called sediment. Gradually,
the sediment accumulates in layers and over a long period of time hardens into rock.
Generally, sedimentary rock is fairly soft and may break apart or crumble easily. You
can often see sand, pebbles, or stones in the rock, and it is usually the only type that
contains fossils.
Examples of this rock type include conglomerate and limestone.
limestone
conglomerate
Copy all questions in your science notebook and provide a complete answer for
each.
1. What are the 3 classes of rocks discussed in the lesson?
2. How are sedimentary rocks formed and what do they often contain?
3. Provide two examples of sedimentary rocks.
Go on to next
slide.
Metamorphic
Metamorphic rocks are formed under the surface of the earth from
the metamorphosis (change) that occurs due to intense heat and
pressure (squeezing). The rocks that result from these processes often
have ribbon-like layers and may have shiny crystals, formed by
minerals growing slowly over time, on their surface.
Examples of this rock type include gneiss and marble
gneiss
marble
Copy all questions in your science notebook and provide a complete answer for
each.
4. How are metamorphic rocks formed?
5. Describe what a metamorphic rock will look like.
6. Provide two examples of metamorphic rocks.
Go on to next
slide.
Igneous
Igneous rocks are formed when magma (molten rock deep within the earth)
cools and hardens. Sometimes the magma cools inside the earth, and other
times it erupts onto the surface from volcanoes (in this case, it is called lava).
When lava cools very quickly, no crystals form and the rock looks shiny and
glasslike. Sometimes gas bubbles are trapped in the rock during the cooling
process, leaving tiny holes and spaces in the rock.
Examples of this rock type include basalt and obsidian.
basalt
obsidian
Copy all questions in your science notebook and provide a complete answer for
each.
7. How are igenous rocks formed?
8. Why do crystal not form on igenous rocks?
9. Explain why some igenous rock will have tiny holes in them.
10. Provide two examples of igenous rocks.
Go on to next
slide.
Copy the table below in your science notebook.
Table 1, Key Characteristics of the 3 main classes of rocks.
Key Characteristics
Crystal
Fossil
Gas Bubble
Glassy Surface
Ribbon-like Layer
Sand or Pebble
Description
In the following slides, you will see 6 different key characteristic for the 3 main
classes of rock. Copy down the description of each characteristic in the
appropriate column of table 1: Key Characteristics of 3 main classes of rocks.
Go on to next slide:
Key characteristics that can help you identify the rocks within the three main classes.
Key characteristics that can help you identify the rocks within the three main classes.
In your science notebook, copy the table below. Title it: Table 2: Rock Collection
Characteristics. After you have, go on to the next slide.
Name of Rock
Conglomerate
Limestone
Basalt
Gneiss
Obsidian
Marble
Description of Rock
Rock characteristics
Class of Rock
Click on the link below to begin a virtual rock collection. As you collect each of the rock
samples, write down the characteristics of each and the class of rock it belongs to in
Table 2: Rock Collection Characteristics in your science note book.
After have completed the table, continue on to play the Identify Rocks Types by clicking
the red tab in the bottom left hand corner of the screen. Use Table 2 that you just
completed to help you. When you have successfully completed the game, make sure all
your vocabulary is complete and all questions have complete answers.
Go onto Lesson 4: .
Virtual Rock Collection