PPT-FOR-EXO-ENDO.pdf

HOW DID YOUR WEEKEND GO? Lord, help students to find physical, mental, and spiritual rest in you, knowing that you are always by their side, guiding and protecting them. As they face challenges—big emotions, homework, stress, and insecurity—fill them with power, love, and self-control. Keep them st...

HOW DID YOUR WEEKEND GO? Lord, help students to find physical, mental, and spiritual rest in you, knowing that you are always by their side, guiding and protecting them. As they face challenges—big emotions, homework, stress, and insecurity—fill them with power, love, and self-control. Keep them steady and sure. AMEN. EARTH SCIENCE: EXOGENIC AND MR. DAVE CONISE ENDOGENIC PROCESSES G11 SCIENCE TEACHER  WHAT IS A ROCK CYCLE? - Summarizes the transformational processes that change rocks from one kind to another.  LEARNING OBJECTIVES FOR EXOGENIC PROCESSES 1. describe how rocks undergo weathering 2. explain how the products of weathering are carried away by erosion and deposited elsewhere. 3. make a report on how rocks and soil move downslope due to the direct action of gravity.  LEARNING OBJECTIVES FOR ENDOGENIC PROCESSES 1. describe where the Earth’s internal heat comes from. 2. describe how magma is formed (magmatism) 3. describe what happens after the magma is formed (plutonism and volcanism)  LEARNING OBJECTIVES FOR ENDOGENIC PROCESSES 4. describe the changes in mineral components and texture of rocks due to changes in pressure and temperature (metamorphism) 5. compare and contrast the formation of the different types of igneous rocks. 6. describe how rocks behave under different types of stress such as compression, pulling apart, and shearing EXOGENIC PROCESSES – It is the processes which occur on earth’s surface due to the influence of exogenic forces. ENDOGENIC PROCESSES - The forces which derive their strength from the earth’s exterior or originate within the earth’s atmosphere. WHAT IS WEATHERING? - Is the mechanical and chemical hammer that breaks down and sculpts. TWO KINDS OF WEATHERING 1. Physical Weathering 2. Chemical Weathering PHYSICAL WEATHERING - also known as mechanical weathering. It refers to the breakdown of rocks without a change in its composition. WHAT ARE THE PROCESSES THAT CAN CAUSE PHYSICAL WEATHERING? 1. Thermal and Pressure Change 2. Freeze and Thaw 3. Wind and Waves 4. Organic activity WHAT ARE THE PROCESSES THAT CAN CAUSE PHYSICAL WEATHERING? 1. Thermal and Pressure Change - Changes in temperature contribute to expansion and contraction of the rocks. WHAT ARE THE PROCESSES THAT CAN CAUSE PHYSICAL WEATHERING? 2. Freeze and Thaw - When water enters the rocks through the pores and cracks, it freezes. WHAT ARE THE PROCESSES THAT CAN CAUSE PHYSICAL WEATHERING? 3. Wind and Waves - Tiny grains of sand are picked up and carried off by the wind, which are then blasted on the surface of rocks, smoothening them. WHAT ARE THE PROCESSES THAT CAN CAUSE PHYSICAL WEATHERING? 4. Organic activity - Trees and other plants can wear away rocks when their roots penetrate into the cracks in the rocks. CHEMICAL WEATHERING - is the decomposition of rocks due to chemical reactions occurring between the minerals in rocks and the environment. WHAT ARE THE PROCESSES THAT CAN CAUSE CHEMICAL WEATHERING? 1. Hydration/Hydrolysis 2. Carbonation 3. Oxidation WHAT ARE THE PROCESSES THAT CAN CAUSE CHEMICAL WEATHERING? 1. Hydration/Hydrolysis - It is the chemical reactions caused by water. WHAT ARE THE PROCESSES THAT CAN CAUSE CHEMICAL WEATHERING? 2. Carbonation - it is the mixing of water with carbon dioxide to make carbonic acid. WHAT ARE THE PROCESSES THAT CAN CAUSE CHEMICAL WEATHERING? 3. Oxidation - It is also known as rusting. It is the process whereby the rock minerals lose one or more ions or atoms in the presence of oxygen. WHAT IS EROSION? EROSION - involves the movement of the weathered rock (now soil, sand or pebbles) from their site of weathering by the agents of erosion such as wind, moving water, ice, and gravity. TRANSPORT - Transport makes erosion complete because it involves the movement of the eroded materials and sediments. TRANSPORT BY WATER - Rain water is the most important agent of erosion. TRANSPORT BY WIND - Wind continuously blows away loose particles of rocks and soil from place to place.