Its all about Rocks. Key Vocabulary The Rock Cycle Sediment Sedimentary Rock Metamorphic Rock Igneous Rock Magma Metamorphosis Melting Heat and Pressure.

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

limestone

Types of RocksRocks 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.

SedimentarySedimentary 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.

conglomerate

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.

Copy all questions in your science notebook and provide a complete answer for each.

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MetamorphicMetamorphic 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

4. How are metamorphic rocks formed?

5. Describe what a metamorphic rock will look like.

6. Provide two examples of metamorphic rocks.

Copy all questions in your science notebook and provide a complete answer for each.

Go on to next slide.

IgneousIgneous 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

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.

Copy all questions in your science notebook and provide a complete answer for each.

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Key Characteristics Description

Crystal

Fossil

Gas Bubble

Glassy Surface

Ribbon-like Layer

Sand or Pebble

Copy the table below in your science notebook.

Table 1, Key Characteristics of the 3 main classes of rocks.

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.

Rock characteristics

Name of Rock Description of Rock Class of Rock

Conglomerate

Limestone

Basalt

Gneiss

Obsidian

Marble

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