Rock Classification

Student Exploration: Rock Classification Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Color-code all answers Vocabulary: classify, extrusive igneous rock, foliation, fossil, igneous rock, intrusive igneous rock, metamorphic rock, mineral, sedimentary rock, strata, texture Prior Knowledge Questions (Do these BEFORE using the Gizmo.) When you classify objects, you organize them into groups based on common characteristics. 1. What are some different ways you could classify these marbles? Find their patterns 2. What characteristics do you think scientists use to classify rocks? they use set of equipment Gizmo Warm-up Rocks are classified by how they formed. The three types are: ● ● ● Igneous rocks form from cooling magma or lava. Sedimentary rocks form from the bonding of rock fragments such as sand, silt, or clay; from organic materials; and from chemicals dissolved in water. Metamorphic rocks form when other rocks are changed by heat and pressure. In the Rock Classification Gizmo, you will get to explore these three types of rocks. Think about how each type of rock is formed. 1. Fossils are the remains of ancient plants and animals. Which type of rock do you think is most likely to contain fossils? Sedimentary rocks are more likely to contain a set or sets of fossils. 2. Foliation occurs when minerals are flattened by heat and pressure. This results in a layered or banded texture. Which type of rock do you think is foliated? Metamorphic rocks would be foliated because of heat and pressure the rocks tend to change. 3. Air pockets can form in rapidly cooling magma or lava. In which type of rock would you expect air pockets? Igneous rocks can form air pockets because they form from cooling of magma or lava. Activity A: Get the Gizmo ready: Classifying rocks ● Click Reset. Introduction: You can classify rocks by examining characteristics such as texture. A rock’s texture is determined by the sizes, shapes, and positions of the grains that make up the rock. Goal: Classify rocks as igneous, sedimentary, or metamorphic. 1. Summarize: The three groups of rocks each have unique characteristics. For example, many igneous rocks have a texture of interlocking mineral crystals. Sedimentary rocks may have distinct layers of sediments, known as strata. To learn other characteristics of igneous, metamorphic, and sedimentary rocks, turn on Show common characteristics in the CHARACTERISTICS pane. In the table below, summarize the textures that will allow you to identify and classify these rock types. Rock type Characteristics The formation happens when magma or lava is cooled. Igneous Forms from the bonding off rock fragment. Sedimentary Metamorphic Forms from intense heat and pressure 2. Classify: Select Name on the SIMULATION pane. Move your cursor over the rock pictures. Based on what you see, classify the rocks by dragging them into the correct box on the CHARACTERISTICS tab. Record your classifications in the table below. Rock type Rock names Igneous 3 main types of igneous rock: Basalt, Obsidian, Granite. Sedimentary 3 main types of Sedimentary rock: limestone, sandstone, shale. Metamorphic 3 Main types of metamorphic rock: Geniss, shist, Marble Click on Status to check your answers. If necessary, change your classifications of rocks on the Gizmo, and make any needed corrections to the table above. When you are done, click tools and take a screenshot (📷). Right-click the image, and click Copy Image, and paste the image here. 📷 NOT ABLE TO ACCESS GIZMOS Activity B: Rock locations Get the Gizmo ready: ● Click Reset. ● Select the LOCATION tab. Introduction: Igneous rocks that form under Earth’s surface are called intrusive. Intrusive igneous rocks usually have large mineral grains because they form from magma that cools slowly. Igneous rocks that form above ground are extrusive. Extrusive igneous rocks have small mineral grains or no grains at all because they form from lava that cools quickly. Question: Where do different kinds of rocks form? 1. Label: ✏ Review how the different types of rock form. On the diagram at right, label where you would expect the following types of rock to form: ● extrusive igneous rocks ● intrusive igneous rocks ● metamorphic rocks ● sedimentary rocks Select Show classification names to check your labels. Correct any rock locations that you labeled incorrectly. 2. Classify: Drag the rocks from the SIMULATION pane to the correct positions on the LOCATION tab. Click on Status to check your placements. When you are done, click tools and take a screenshot (📷). Right-click the image, and click Copy Image. Then paste the image here. 📷 📷NOT ABLE TO ACCESS GIZMOS Sorry Mrs. Bowden I tried again for gizmos and still didn’t work and for questions 3 and 4 on this page I am confused. Which rocks did you classify as extrusive and intrusive igneous rocks? Extrusive: Intrusive: 3. Analyze: What features did you use to classify igneous rocks as extrusive or intrusive? 4. Draw conclusions: Extrusive igneous rocks often have air pockets, but intrusive igneous rocks never do. Why do you think is this the case? Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved Reproduction for educational use only. Public sharing or posting prohibited. © 2020 ExploreLearning™ All rights reserved