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Weathering and Soil

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  • What is a more powerful weathering agent than water?
    acid
  • What part of a rock oxides the most?
    The outer part
  • Rocks rubbing against each other grinding away by friction/impact is called...
    Abrasion
  • Rocks breaking down into smaller fragments is caused by...
    Mechanical weathering
  • Acid has a pH less than...
    7
  • Materials that make up rocks and change into new materials is called...
    chemical weathering
  • What type of soil holds more water and nutrients?
    Clay soil
  • A rock that contains metal (like gold, iron, or copper) is called a...
    Ore
  • In chemical weathering, what does oxides form?
    Ores
  • Name one type of chemical weathering.
    Reaction with water, oxygen, acid, or organisms
  • In mechanical weathering, the total surface area of the rock...
    Increases
  • Where does weathering occur fastest?
    areas near the equator
  • Oxygen used in oxidation comes from...
    air
  • Why can rain break down rocks?
    Rain is acidic
  • What does mechanical and chemical weathering depend on?
    Water and temperature
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