science-4th Quarter

• Conductors


  Materials that allow heat and electricity to pass through them
• Insulators


  Materials that do not allow electricity to pass through them
• Metals are good conductors while non-metals are insulators
• Circuit


  A complete path that allows free flow of electricity
• Closed circuit


  Makes a bulb light up because electricity flows through it
• Series circuit


  An electrical circuit where parts are arranged in a single path
• Parallel circuit


  An electrical circuit where parts are arranged in several paths
• Electromagnet


  A temporary magnet produced by making electricity flow through a wire coiled around an iron nail
• Uses of electromagnets

  • Appliances
  • Modern gadgets
  • Toys
  • Telephones
  • Generators
  • Transformers
• The Earth is mainly composed of rocks that differ in terms of (rized) sizes, shapes and colors
• Weathering


  The breaking of rocks into fragments
• Weathering


  • It is an important process that helps shape the Earth's surface
  • It results in the formation of soil and different landforms
• Mechanical weathering


  The physical wearing-away of rocks
• Chemical weathering


  A change in the composition of rocks that allows them to break down into pieces
• Agents of weathering

  • Water
  • Wind
  • Temperature
  • Plants
  • Animals
  • People
• Water can break rocks in different ways, such as strong waves hitting the rocks and water freezing in cracks and expanding
• Wind carries sand and small rock particles that can scratch the surface of rocks, causing mechanical weathering
• Temperature changes cause rocks to expand and contract, resulting in weathering
• Some plants, like lichens, ferns, and mosses, can also trigger weathering
• Erosion


  The movement of rock fragments and soil from one place to another
• Agents of erosion

  • Water
  • Wind
  • Animals
  • Humans
• As water flows, it transports rock particles from one place to another
• Wind carries light particles of rocks and soil, transporting and depositing them in another place
• Wind erosion can take place in areas where the soil is not compacted
• Frangelico Manigo
• Francisco Dagohoy
• Diego Silang
• Ang sumusunod ay ang pagbubukas ng Suez Canal
• Natutu ang mga Pilipino
• Nakarating ng mabilis ang mga Filipino sa Europe
• Mas bumilis ang biyahe mula Pilipinas hanggang Europe
• Mas dumami ang kalakalan mula Europe