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Earth and Life Science - Rocks

This is a powerpoint presentation that is about one of the Senior High School Core Subject: Earth and Life Science. It is composed of the definition, characteristics and processes about rocks.

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Earth and Life Science - Rocks

  2. 2. WHAT IS A ROCK? Any naturally occurring solid mass or consolidated aggregate of minerals or mineraloid matter. It is not a single, uniform crystal mineral thus it is composed of different minerals
  3. 3. FEATURES OF A ROCK: Texture (Shape and Arrangement, not the feeling of the rock’s surface) Structure Grain Size (size of individual mineral crystals) Chemical Composition Color Strength Hardness
  4. 4. WHAT IS A BEDROCK? A deposit of solid rock that is typically buried beneath soil and other broken or unconsolidated material
  5. 5. HOW WERE ROCKS FORMED? Rocks are formed when they successfully complete the process of rock-forming called lithification Lithification = sediments compacted under pressure expel connate fluids (water and minerals) and became solidified as rocks
  6. 6. PROCESS OF LITHIFICATION: Compaction (a sediment loses its porosity due to effects from loading) Cementation (ions of groundwater chemically precipitating to form new crystalline material)
  7. 7. HOMEWORK: Research the definition and characteristics of the types of rocks: (Igneous, Metamorphic and Sedimentary) Give at least two examples of rocks under that category or type