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

Rocks are not all the same! 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. conglomerate limestone

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 Description Crystal Fossil Gas Bubble Glassy Surface Ribbon-like Layer Sand or Pebble

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 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 Description of Rock Class of Rock Conglomerate Limestone Basalt Gneiss Obsidian Marble Rock characteristics

Click on the link below to begin a virtual rock collection 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