1. Objective (READ) SWBAT identify the causes of weathering. - Go in order, step 1, step 2, step 3 - directions are in parentheses 2. Question of the Day. (TURN OBJECTIVE INTO A QUESTION) 3. Warm-up (ANSWER) A. Data showing the number of students who live in an apartment is an example of which of the Geographer’s Tools. B. How could a police officer use GPS? Warm-up Page Date Question of the Day Warm-up 9/2 What are the causes of weathering? 1. Data collected about people = demographics 2. Could use it to log the scene of a crime so he can return in the future Table of Contents Date Title Lesson # **Thinking Like a Geographer** 8/26 5 Themes of Geography 2 8/27 The 5 A’s 3 8/31 Geographer’s Tools 4 9/2 Weathering 5 1. Make a new page called “WEATHERING”. 2. Label it page 5. External Processes Erosion Weathering • Weathering - changing rocks, land, and objects over time • 2 types: Mechanical Weathering and Chemical Weathering COPY WHAT’S IN THE BOX Mechanical weathering – forces break rocks into smaller pieces by forcing them apart. COPY WHAT’S IN THE BOX Causes of Mechanical Weathering 1. Root wedging – roots break up rocks 2. Frost Wedging - ice breaks up rocks 3. Thermal expansion – heat causes rocks to expand and break COPY WHAT’S IN THE BOX Effects of Mechanical Weathering Conclusion • How is mechanical weathering like a hammer? • Directions: Copy the sentence above and write one complete sentence responding to it in your notebook. Chemical Weathering • Chemical weathering - when something "eats away" at a rock instead of breaking it apart. • Requires a chemical change in the rocks COPY WHAT’S IN THE BOX Causes of Chemical Weathering Directions: 1. Acid Rain - Copy the headline and each cause Regions Sensitive to Acid Rain Orso University Challenge Question: Why do Houston, Chicago, and Los Angeles have such low levels of acid rain? Causes of Chemical Weathering 2. Water – creates a chemical reaction in certain objects 3. Chemicals – resulting from pollution or internal processes Foaming pollution on rocks. Effects of Chemical Weathering At PH1, this New Zealand lake is pure hydrochloric acid Naked trees Rust Analysis - Create a weathering wonderland. - - Sketch a landscape that includes examples of weathering resulting from each of the 6 causes. (3 mechanical, 3 chemical) Label each cause Directions/Requirements - Need 6 pictures (3 mechanical weathering and 3 chemical weathering) - Need a caption explaining each cause - Need a title Rocks that have split apart due to thermal expansion. Weathering Wonderland Conclusion 1. On your Wonderland, draw a big M next to each example of mechanical weathering and draw a big C next to each example of chemical weathering. 2. You are the mayor of a new city called Weathering Wonderland. - EXPLAIN three ways that weathering harms your city. Weathering Assignment – Option 2 • You are the mayor of a new city called Weathering Wonderland. Your local news station is interviewing you about the problems your city has due to weathering. You will get more money from the federal government if you can convince the audience that your town is in trouble. (Remember a Volcano and Earthquake are internal processes) Directions: - Select either option 1 or option 2 below. Either option will receive full credit. - Complete this in your notebook on your weathering page. Option 1 – Write a paragraph explaining the problems you have during a typical day in your city that are caused by weathering. a. You must include at least 5 examples of weathering and the problems they cause in your town b. Include an explanation of why each example is a problem. Option 2 – Draw a picture (or map) of your town’s problems related to weathering. a. You must include at least 5 example of weathering and the problems they cause in your town. b. Include evidence showing why each example is a problem. c. Label each example so they are easy for me to identify. Closure 1. Answer the Question of the Day.