Types of Rocks LESSON 4.1MIDDLE SCHOOL EARTH SCIENCE UNIT 2 – CHAPTER 4
Lesson Objectives In this lesson, students connect rock specimens to the rock processes and cycles that form them. By lessons end, students will be able to: Define rock and describe what rocks are made of. Know how rocks are classified and described. Explain how each of the three main rock types are formed. Describe the rock cycle.
Standards 3.2.6.A1 Distinguish the differences in properties of solids, liquids, and gases. Differentiate between volume and mass. Investigate that equal volumes of different substances usually have different masses. 3.2.6.A2 Compare and contrast pure substances with mixtures. 3.2.6.A3 Explain and give examples of how mass is conserved in a closed system. 3.2.6.A4 Differentiate between physical changes and chemical changes.
Note-taking Before you begin to view this PowerPoint and the remainder of the content for this lesson, please open up your note-taking template. It is under the “Note-taking Time” tab for this lesson. At the end of this lesson, you will submit your notes upon completion on the Lesson Journal.
Essential Questions 1. Describe the difference between a rock and a mineral. 2. Why can the minerals in a rock be a clue about how the rock formed? 3. What is the difference between magma and lava? 4. What are the 3 main types of rocks and how does each form? 5. Describe how an igneous rock can change to a metamorphic rock. 6. Explain how sediments form. 7. In which rock type do you think fossils, which are the remains of past living organisms, are most often found? 8. Suppose that the interior of the Earth was no longer hot, but all other processes on Earth continued unchanged. How would this affect the distribution of rocks formed on Earth?
Vocabulary chemical composition Description of the elements or compounds that make up a substance and how those elements are arranged in the substance. deposited Put down or dropped by water or wind onto the ground. lava Molten rock at the surface of Earth. magma Molten rock below Earth’s surface. mineral Naturally-occurring solid that has a definite crystal structure. molten Something that is melted. organic Having to do with living things. precipitates Solid substance that separates out of a liquid; a solid substance that was once dissolved in a liquid and gets left behind when the liquid evaporates. sediments Small particles of soil or rock deposited by wind or water.
Types of Rocks You should have already watched the “Getting Started” video entitled Geology Kitchen: The Three Types of Rocks As mentioned in the video, there are different types of rocks in our environment There are 3 basic rock types; 1. Igneous Rocks 2. Sedimentary Rocks 3. Metamorphic Rocks
Igneous Rocks Igneous rocks are formed deep within the Earth. They come from liquid hot magma, that cools and transforms into a solid state.
Sedimentary Rocks If Igneous rocks form deep within the Earth, then Sedimentary rocks form right at the surface. They are created by the sediment from air, water and chemicals reacting in our physical environment.
Supplemental Learning Assignments As a supplement to this PowerPoint, there are two other learning activities that I feel will really help you to greater understand the types of rocks and the rock cycle. The second learning activity is a reading assignment from your Earth Science Middle School textbook. Please read pages 94-100 To access the 1st activity; go to http://www.brainpop.com/search/search.weml?keyword=rocks On this site there are two short cartoons entitled; 1. “Types of Rocks” 2. “Rock Cycle”