More Related Content
Similar to Lesson 1 Distribution of Active Volcanoes, Earthquake.pptx (20)
Lesson 1 Distribution of Active Volcanoes, Earthquake.pptx
- 1. DISTRIBUTION OF ACTIVE VOLCANOES, EARTHQUAKE EPICENTERS, AND MAJOR MOUNTAIN BELTS LESSON 1
- 2. • Read and study the picture. • Do you know the location of active volcanoes in the Philippines ? • Can you locate them in the map?
- 4. • Our country is situated in the Pacific Ring of Fire where the oceanic plate and several smaller micro plates sub- ducting along the Philippine plate and sever-al microplates along the Philippine Trench to the East and smaller trenches to the West.
- 5. • To date, as per report of the PHILVOCS (Philippine Institute of Volcanology and Seismology), there are 53 active volcanoes in the Philippines characterized by two major NS trending arcs – the Luzon and Mindanao Volcanic Arcs.
- 6. • This makes the country’s tectonic setting complex aside from having a number of small plates squeezed between two convergent plate margins, separated by small subduction zones and major transform faults. • Active
- 7. • Some volcanoes in the Philippines are active or dormant. We describe volcanoes as dormant and active based from their frequency of eruptions. • Those that erupt regularly are called active and those that have erupted in the past and are inactive are called dormant.
- 9. • Taal, Pinatubo and Mayon volcanoes are the familiar volcanoes of the country in terms of their eruptions. • They are formed when pieces of earths crusts called plates smash and buckle up through a process called plate tectonics.
- 10. • Some form mountain ranges or hill ranges arranged in a line and connected by high ground. A group of mountain ranges with similarity in form , structure and alignment is called a mountain belt.
- 11. • There are mountain ranges closest to a certain volcano. Say for example, for Taal Volcano, they are Mount Macolod (3107 ft.) which is 7 miles away from Taal, Mt. Talamitan (2310 ft.), 17.3 miles away from Taal,
- 12. • Mount Panay (1,644 ft.) 22.2 miles from Taal and San Pablo Volcanic Field (3576 ft.) which is 22.2 miles away from Taal. • Can you name the mountain ranges of other active volcanoes in the country ?
- 13. • Seismic waves are the waves of energy caused by the sudden break-ing of rock within the earth or an explosion. They are the energy that travels through the earth and is recorded on seismographs. • There are several different kinds of seismic waves. These waves move in different ways. • Body waves can travel through the earth's inner layers while surface waves can only move along the surface of the planet like ripples on water. Seismologist can determine the difference in arrival times between the P-wave and the S-waves.
- 14. • There are several different kinds of seismic waves. • These waves move in different ways. Body waves can travel through the earth's inner layers while surface waves can only move along the surface of the planet like ripples on water. • Earthquakes radiate seismic energy as both body and surface waves. Traveling through the interior of the earth, body waves arrive before the surface waves emitted by an earthquake.
- 15. • These waves are of a higher frequency than surface waves. • The first kind of body wave is the P wave or primary wave. • This is the fastest kind of seismic wave, and, consequently, the first to 'arrive' at a seismic station.
- 16. • The P wave can move through solid rock and fluids, like water or the liquid layers of the earth. • It pushes and pulls the rock it moves through just like sound waves push and pull the air. • P waves are also known as compressional waves, because of the pushing and pulling they do.
- 17. • Seismologists use triangulation to find the epicenter of an earth-quake. When seismic data is collected from at least three different locations, it can be used to determine the epicenter by where it intersects. • Every earthquake is recorded on numerous seismographs located in different di-rections.
- 18. • Each seismograph records the times when the first (P waves) and second (S waves) seismic waves arrive. • From these, seismologist can determine how fast the waves are traveling. Knowing this helps them calculate the distance from the epicenter to each seismograph.
- 19. • Earthquake is the shaking of the earth’s surface that often causes a great damage. Epicenter is the part of the earth’s surface that is directly above the place where earthquake starts. • Volcanoes are a mountain with ahole in the top or side that sends out rocks, ash, lava, and etc. and mountain ranges are succession of many closely spaced mountains covering a particular portion of earth.
- 20. • The location of most active volcanoes, earthquake epicenters, and mountain ranges are found in the Pacific Ring of Fire or in the Pacific Ocean basin.
- 21. • Activity 1: Complete the table below. Using the picture to describe its observable or physical characteristics. Activity
- 23. • Activity 2: Below is a map showing the location of the active volcanoes, earthquake prone areas and mountain ranges in the Philippines. List them down. Describe their locations.
- 26. • Activity 3: Using the world map, locate and list down the location of active volcanoes , earthquake zones and mountain ranges in the world.
- 27. • Location of active volcanoes, earthquake epicenters, and mountain ranges in different Continents
- 28. • Questions: • 1. Based on the map, list down the places where you can find the following; • a. volcanoes • b. earthquake epicenters • c. mountain ranges
- 29. • 2. Why do active volcanoes, mountain ranges/folded mountains, and earth-quake zone are located in the same place? • 3. Explain why those places in the map have active volcanoes, earthquake epicenters and mountain ranges.
- 30. • Activity 4: Complete the concept map. Copy this in your notebook. • Use the paragraph before the concept map as your guide to look for more information from other sources.