Que

• Sit properly


  Back should be touching the chair back rest
• Change position regularly


  Sit on couch, chair, or floor
• Dim lighting


  Rather than strong or no lighting to avoid eye damage
• Stretch

  Use commercial breaks to change positions, get up, walk around, and do gentle stretches
• Don't watch TV in bed

  Often leads to neck and back ache
• Plate tectonics explains the features and movement of the earth's surface in the present and the past
• What's the mystery word challenge

  1. Level 1: Location above the focus earthquake

  2. Level 2: Landform with steep slopes larger than hills

  3. Level 3: Instrument to detect and measure earthquake intensity

  4. Level 4: Violence, shaking, destruction, movement within the earth's crust

  5. Level 5: Opening in earth's crust, molten rock
• Lithosphere

  • 100 kilometer thick layer of solid rock including the crust
• Asthenosphere


  • Upper mantle beneath the lithosphere, solid but softer due to high pressure and temperature, allows convection
• The earth's lithosphere is broken into numerous segments called plates
• Seven large plates

  • African
  • Antarctic
  • Eurasian
  • North American
  • South American
  • Indian
  • Australian
  • Pacific
• Earthquakes, volcanoes, and mountain ranges are concentrated in narrow zones, particularly along plate boundaries
• The Philippines is situated in the Pacific Ring of Fire, a geologically active area with frequent earthquakes and volcanic eruptions
• About 90% of the world's earthquakes occur in the Pacific Ring of Fire
• Alfred Wegener's theory of continental drift

  Theory that explains the movement of continents
• All the continents form a single continental mass
• This supercontinent was named as Pangaea
• Pangaea means "all earth"
• A mega ocean surrounded the single continental mass
• This mega ocean was called Panthalassa
• Panthalassa means "all water"
• Around 200 million years ago, the supercontinent Pangaea began to split
• Pangaea first broke into

  • Laurasia
  • Gondwanaland
• Laurasia


  The northern component of the split supercontinent
• Gondwanaland


  The southern component of the split supercontinent
• Laurasia and Gondwanaland continued to break into various smaller continents that we see today