Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Sequence of Lesson for Sedimentary Rocks 1. Preclass video: Students view Sedimentary Rocks and answer related questions in an online quiz (for example see https://geosciencevideos.files.wordpress.com/2015/05/sedimentaryrocks_quiz.pdf). 2. Class begins with a review of learning objectives from video and class lesson (slide 2). 3. Students answer a series of multiple choice and short answer questions (slides 3,4,5) related to video. (Slides 4 and 5 represent two approaches to the same concept – a conceptual multiple choice question or a Venn diagram sorting exercise.) 4. The video deals with the classification of sedimentary rocks. The lecture adds details about physical and chemical weathering and transportation processes in clastic sediments. We check on comprehension with a few conceptest questions (e.g., slides 6,7). We discuss how we can unravel a sequence of rocks to make interpretation of the geologic history of a region (foreshadowing a related conversation in the Geologic Time module). 5. Class ends with a reflection exercise (slide 8) that can be completed later 1 and review of the day’s learning objectives. LO: I can explain how sedimentary rocks are formed and where they can be found. Which environment would be most likely to produce a rock like this? Learning Objectives Learning Objectives of the Video Sedimentary Rocks 1. I can classify the three major types of sedimentary rocks and give examples of each. 2. I can explain how sedimentary rocks are formed and where they can be found. Learning Objectives of the Related Class Lesson 1. I can describe the differences between physical and chemical weathering. 2. I can explain how transportation controls the size, shape and sorting of clastic sediment. 3. I can explain how the characteristics of sedimentary rocks can be used to interpret ancient environments. 2 LO I can classify the three major types of sedimentary rocks and give examples of each. What combination of properties best represents the features of chemical and biochemical sedimentary rocks as represented by this Venn diagram? Chemical Sed Rocks A. Lake B. Stream channel C. Sand dunes D. Mountains Biochemical Sed Rocks A. 1 = Salt; 2 = From dead plants; 3 = Form under shallow marine conditions B. 1 = Form due to changing physical 1 2 3 conditions; 2 = From dead organisms; 3 = Chalk C. 1 = Salt; 2 = Form by precipitation from seawater; 3 = From dead plants D. 1 = Form by precipitation from seawater; 2 = Salt; 3 = Chalk LO: I can classify the three major types of sedimentary rocks and give examples of each. Chemical Sedimentary Rocks Use the Venn diagram to compare and contrast the properties of chemical and biochemical sedimentary rocks. Place the letters in the appropriate location on the diagram. Any characteristics that are shared between the rock types should be placed in the overlap region. Biochemical Sedimentary Rocks A A. B. C. D. E. F. G. H. Chalk and coral form from living organisms Used to interpret geological history Examples: gypsum; salt May form under shallow marine conditions Coal forms from dead plants Form due to changes in physical conditions Can form by precipitation from a solution Limestone is an example LO: I can describe the differences between physical and chemical weathering. Which region would exhibit the most rapid rate of chemical weathering for the same rock type (e.g., limestone)? A. A hot, dry state like Arizona B. A cool, humid state like Oregon C. A very cold region like Alaska D. A warm, humid state like North Carolina 1 LO: I can explain how transportation controls the size, shape and sorting of clastic sediment. Reflection Exercise What does the “sorting” of clastic sediment represent? A. Changes in sediment grain shape B. Changes in sediment grain size C. Changes in sediment composition 1. Look over your notes and summarize five features that geologists might use to interpret something about the environment in which a sedimentary rock was formed. 2. Answer the following: a) What was the most interesting thing you learned today? b) What remains the most confusing concept? 8 2