Earth Materials and Processes Secon.pptx

Earth Materials PPT

1. JENIE RICA B. PALEC

2. Earth Materials and Processes: EXOGENIC PROCESS

3. 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 direct action of gravity. OBJECTIVES

4. Group 1 Group 2

5. These are processes that takes place at or near the earth’s surface wear away. EXOGENIC PROCESS

6. PHYSICAL Weathering *CHEMICAL Weathering TYPES OF WEATHERING

7. WEATHERING EROSION MASS MOVEMENT (Mass Wasting) DIFFERENT TYPES OF EXOGENIC PROCESS

8. WEATHERING is the deterioration of rocks soils and mineral

9. Mechanical weathering The breakdown of rocks without a change in its composition Physical Weathering

10. Physical Weathering

11. Chemical Weathering Decomposition of rocks due to chemical reactions occurring between the minerals in rocks and the environment Transforms rocks and minerals exposed to water and gases in the atmosphere into new chemical compounds thus, forming different rocks and minerals.

12. Chemical Weathering

13. Chemical Weathering

14. Thermal and Pressure change when a rock gets hot, it expands an increase in volume, while at night, the rock gets cold causing contraction. Processes that can cause Physical weathering

15. 2. Wind and waves Tiny grains of sand are picked up and carried by the wind On the seashore, the action of waves chips away and cracks the rocks Processes that can cause Physical weathering

16. Processes that can cause Physical weathering

17. 3. Freeze and Thaw Processes that can cause Physical weathering

18. 4. Organic Activity Processes that can cause Physical weathering

19. 1.HYDRATION/ HYDROLISIS Process where molecules of some substance in rocks chemically combine with water molecules Processes that can cause Chemical weathering

20. 2. CARBONATION Process where carbon dioxide may bond with other substances Processes that can cause Chemical weathering

21. 3. OXIDATION Processes that can cause Chemical weathering

22. Erosion always follows after weathering. Transport by the water. -Rain water -Gravity Transport by the wind EROSION

23. Mass movement (Mass Wasting)

24. Mass movement (Mass Wasting) Slope movement Bulk movement of soil, sand and rock debris downslopes in response to the force of gravity or the rapid or gradual sinking of the Earth’s ground surface.

25. Mass movement (Mass Wasting)

26. Mass movement (Mass Wasting)

27. ACTIVITY TIME!

28. GENERAL INSTRUCTIONS: Read and Understand the case and answer the questions that follows. Each group will prepare short reports outlining the impact of weathering, erosion, and downslope movement. Each group will present their findings in the class.

29. CASE STUDY Title: Bryce Canyon National Park- The forces of erosion Bryce Canyon National Park, located in southwest Utah, USA, is a stunning example of the intricate and unique landscapes shaped by exogenic processes. The park is renowned for its horseshoe-shaped amphitheaters, filled with thousands of hoodoos- tall and thin rock spires that stand like sentinels across the landscape. This case study delves into the forces of erosion that have sculpted Bryce Canyon into the remarkable natural wonder it is today.

30. Questions: Geological Context Describe the geological history of Bryce canyon. What types of rocks are predominant in the region? How did the initial geological conditions contribute to the formation of Bryce Canyon’s distinctive features? Erosion Process Identify the primary agents of erosion responsible for shaping Bryce Canyon.

31. Explain how frost wedging, rainwater erosion, and other erosional processes have contributed to the formation of hoodoos and other geological features. Timeline of transformation Estimate the approximate timeline of the formation of Bryce Canyon. How long did the erosional processes take to create the current landscape? Discuss the role of climate variations overtime in influencing erosion rates.

32. Human Impact Examine the impact of human activities, such as tourism and infrastructure development, on the erosion rates of Bryce Canyon. Evaluate the effectiveness of conservation efforts to mitigate the impact of human activities on the geological features. Future Landscape Evolution Predict how the landscape of Bryce Canyon might continue to evolve in the future. Consider the potential impact of climate change on erosion to evolve in the future.

33. Comparison with other Landscape Compare Bryce Canyon’s erosional features with another landscape affected by similar exogenic processes. Discuss similarities and differences, considering factors like geological composition, climate, and human impact.

34. EVALUATION 1. Write a reflection on one key concept you found interesting or challenging on exogenic process.

35. ASSIGNMENT 1. Research and write a short essay on a famous geological feature shaped by exogenic process.

36. THANK YOU FOR LISTENING 