Monday, October 29th Entry Task Think about any information that you feel unsure about when it comes to rocks. List 3 things you would like further information on or for me to clarify. Schedule: • Rock Notes Objective: I can understand important information about rocks Homework: • Chapter 3 review p. 105 #1-34 • Chapter 2/3 test on Wednesday ROCKS • A Rock is a naturally formed solid that is usually made up of one or more types of minerals ROCKS vs. Minerals Rocks 1.Proportions of minerals vary 2. Minerals can be jumbled together 3.None to 1 or more minerals can be present Minerals 1. Is the same elements in the same proportions 2. There is an orderly crystal structure Examples of Rocks Rocks with no minerals OBSIDIAN – glass like and does not have a crystal structure 1 or more minerals LIMESTONE- can be made entirely of calcite COAL- is made of dead plants GABBRO- made of several types of minerals Our world is built of rocks Rock is so common and has many purposes They last a long time 1. Building houses and skyscrapers 2. Sources of metal like iron aluminum and copper 3. Carvings of statues and art 4. Pavement on roads and highways Ancient structures, monuments and sculptures were made from rock • Great wall of china • Pyramids in Egypt • Mount Rushmore Rocks change as they move through the rock cycle The Rock cycle is a set of natural processes that form, change, and break down, and reform rock. • • • • Rocks are classified by how they form There is no particular order to the rock cycle There is no beginning and no ending These changes take thousands to million of years TYPES OF ROCKS 1. IGNEOUS- Forms when molten rock cools and becomes a solid (lava and magma) 2. SEDIMENTARY- Forms when pieces of older rocks, plants, and other loose materials are pressed together at the earths surface (weathering and erosion) 3. METAMORPHIC- Forms when older rocks buried deep in the crust change into new types of rock (heat and pressure) Tuesday, October Entry Task 1. 2. 3. 4. th 30 Schedule: Write down the big idea • Chapter 2/3 review for chapter 2 Objective: Write down the key •I can understand important concepts for each information about minerals and section in chapter 2 rocks Write down the big idea for chapter 3 Homework Write down the key • Chapter 2 review- page 69-70 concepts for each # 1-29 in your notebook section in chapter 3 Please have on desk: • Chapter 3 review Wednesday, October 31st Entry Task 1.What are 3 things that you learned from chapter 2? 2.What are 2 things that you need to study more from chapter 2? 3.What are 3 things that you learned from chapter 3? 4.What are 2 things that you need to study more from chapter 3? Schedule: • Chapter 2/3 test Objective: I can understand important information about minerals and rocks Homework: • Chapter 4 intro Please have on desk: • Chapter 2 review Thursday, November 1st Entry Task Look at the photograph on page 112 and answer the following questions using full sentences, IQIA. 1. What are some examples of natural forces? 2. Which natural forces might break apart rocks? 3. What might happen to rocks after they break apart? Schedule: • Bill Nye-Weathering and Erosion Objective: I can understand basic information about Weathering and Erosion Homework: • Read/RSG 4.1 Please have on your desk • Chapter 4 intro Entry Task Friday, November Imagine you are hiking in the forest and pass a young oak tree growing in the crack of a large rock. 1. Describe what will happen to the rock as the tree grows into a full-grown oak 2. Is this an example of mechanical or chemical weathering? 3. What is likely to happen as a result of this happening? nd 2 Schedule: • Weathering and Erosion Notes Objective: •I can understand that chemical and mechanical forces break down rock Homework • 4.1 quiz Monday • 4.1 questions #1-6 Please have on desk: • 4.1 RSG • • Weathering is the process by which natural forces break down rocks. There are 2 types of weathering: – – Mechanical weathering Chemical weathering • • Mechanical weathering is the breaking up of rocks by physical forces. There are 4 main types: – – – – Ice wedging Exfoliation Plant root growth Abrasion • When water freezes, it expands. When water freezes in the cracks and pores of rocks, the force of its expansion is strong enough to split the rocks apart. • The process in which layers or sheets of rock gradually break off due to the expansion of the rock caused by a decrease in pressure. • Trees, bushes, and other plants may take root in cracks of rocks. As the roots of these plants grow, they wedge open the cracks. • The process of wearing down by friction, the rubbing of one object or surface against another. • • The breakdown of rocks by chemical reactions that change the rocks’ makeup, or composition. There are 2 main types: – – Dissolving Rusting • • Water is the main cause of chemical weathering. Many more minerals dissolve in water that is slightly acidic – like lemonade. • • The oxygen in air is also involved in chemical weathering. Many common minerals contain iron. When these minerals dissolve in water, oxygen in the air and the water combines to produce rust. • • Most weathering occurs over long periods of time – hundreds, thousands, or even millions of years. There are 3 Influential factors: – – – Surface area Rock composition Climate • The more of a rock’s surface that is exposed to air and water, the faster the rock will break down. • Different kinds of rock break down at different rates. • • Chemical weathering occurs faster in hot, wet regions than it does in cold, dry regions. Mechanical weathering caused by freezing and thawing occurs more in cold regions than in hot regions.