Week 5 Day 3 - Plate Tectonics Earthquakes and Tsunamis.pptx

grade 10 quarter 1

1. Plate Tectonics: Earthquakes and Tsunamis

2. What Are Plate Tectonics? Plate tectonics is the theory that Earth's outer shell (the lithosphere) is divided into several plates that move and interact with each other.

3. How Do Plate Tectonics Cause Earthquakes? Earthquakes occur when tectonic plates grind past each other or collide, causing stress to build up until it is released as seismic waves.

4. What is an Earthquake? An earthquake is the shaking of the Earth's surface caused by sudden release of energy from the Earth's crust.

5. The Anatomy of an Earthquake Seismic Waves: Energy waves that travel through the Earth’s crust and cause shaking. Seismograph: A tool used to detect and record the strength and duration of seismic waves

6. Types of Earthquakes Based on Focus Shallow-Focus Earthquake: Occur at a depth of less than 70 km from the Earth’s surface. Usually more damaging because they are closer to the surface

7. Types of Earthquakes Based on Focus Deep-Focus Earthquake: Occur at a depth greater than 300 km. Less surface damage but can be powerful.

8. What is a Tsunami? A tsunami is a series of large ocean waves caused by the displacement of water, often due to underwater earthquakes or volcanic eruptions.

9. How Are Earthquakes and Tsunamis Related? Earthquakes, especially those that occur underwater or near coastlines, can displace a large amount of water, creating tsunamis.

10. Safety Tips for Earthquakes and Tsunamis Earthquake Safety: Drop, cover, and hold on; stay away from windows and heavy objects. Tsunami Safety: Move to higher ground immediately; listen to emergency alerts.

11. Remember! it's important to practice earthquake drills at home and at school so that you are prepared and know exactly what to do. Being prepared and staying calm are key to staying safe during an earthquake.