SCI10 Plate Tectonics

Morning Prayer and Reflection

• Title: Have a Nice Day!

• Preparation for morning prayer and reflection on a guiding quote.

Prayer of a Lasallian

• Introduction of prayer:

  • Bow heads, invoking the holy presence of God.

  • Sign of the Cross:

    • "In the name of the Father, and of the Son, and of the Holy Spirit. Amen."

  • Invocation of St. John Baptiste de la Salle:

    • "St. John Baptiste de la Salle, pray for us. Live Jesus in our hearts forever! Amen."

• Main Content of Prayer:

  • Acknowledgment of God's loving kindness.

  • Request for guidance throughout daily activities.

  • Call for the Holy Spirit to strengthen faith.

  • Conclusion of prayer:

    • The prayer is offered through Jesus.

PLATE TECTONICS

• Introduction to Grade 10 Science topic.

Course Outline

• A. Internal Structure of the Earth

• B. Theories on Plate Tectonics

• C. Plate Boundaries

• D. Distribution of Earthquakes and Volcanoes

Internal Structure of the Earth

• Earth layers:

  1. Crust

  2. Mantle

  3. Outer Core

  4. Inner Core

Review of Internal Structure

• Crust:

  • Thin, solid layer forming Earth's surface.

• Inner Core:

  • Solid iron and nickel inner layer.

• Outer Core:

  • Liquid layer surrounding inner core, generating Earth's magnetic field.

• Lithosphere:

  • Rigid upper layer of the mantle and crust.

• Asthenosphere:

  • Solid rock layer that flows slowly.

• Continental Crust:

  • Thicker, less dense, primarily granite composition.

• Oceanic Crust:

  • Thinner, denser, primarily basalt composition.

Rock Types of Crust

• Basalt: Dense, fine texture found in oceanic crust.

• Granite: Light-colored igneous rock found in continental crust.

Crust Characteristics

• Thickness varies drastically:

  • 7 km in oceanic regions

  • 8-40 km in continental regions

  • Over 70 km in mountainous regions

Earth’s Lithosphere

• Composed of relatively rigid plates that move independently.

Plate Boundaries

• Definition and explanation of how plates interact.

• Typical movement rates of plates:

  • ~50 mm/year (2 in/year), up to 240 mm/year (10 in/year).

Home-based Lab Activity: Cookie Plate Boundary

• Clarification on how to present geographic location in contexts of natural calamities.

  • Use of multimedia presentation methods.

Convergent Boundaries

• Definition: Subduction zone occurs when one oceanic plate is forced down.

• Sub-types:

  1. Oceanic-Continental

  2. Oceanic-Oceanic

  3. Continental-Continental

Consequences of Convergence

• Formation of volcanic arcs through magma development.

• Creation of new mountain ranges through collision.

Divergent Boundaries

• Illustrated by rift valleys and oceanic ridges.

• Mechanism of seafloor spreading producing new lithosphere.

Transform Boundaries

• Plates grind past each other without producing or destroying lithosphere.

Volcanoes and Eruptions

• Definition and types, processes of eruptions based on magma characteristics.

  • Active: Erupted in last 10,000 years

  • Dormant: Erupted but currently inactive

  • Extinct: Never erupts again.

Distribution of Volcanoes

• Most volcanoes occur at tectonic boundaries (subduction zones, divergent zones).

• Hotspots: Areas of volcanism not associated with plate boundaries (e.g., Hawaiian Islands).

Importance of Volcano Monitoring

• Signs of potential eruptions include earthquakes and gas emissions.

• Monitoring methods include deformation and gas analysis.

Earthquake Fundamentals

• Earthquake definition and key terms (Focus, Epicenter, Fault).

• Relationship between volcanic activity and earthquakes demonstrated.

Seismic Activity

• Earthquakes occur primarily at plate boundaries due to pressure build-up.

  • Reference to the Richter Scale for measuring magnitude.

Summary on Earthquakes and Volcanoes

• Focus on their distribution and formation mechanisms.

• Impact of tectonic plate movements on geological features.

Conclusion and Reflection on Science Month

• Celebrate science through various events and themes focused on technology and research.