Curriculum
Course: Science — Second Preparatory
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Curriculum

Science — Second Preparatory

Unit 1: Matter and Energy

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Unit 2: Matter and Chemical Reactions

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Unit 3: Energy Flow in Photosynthesis and Respiration

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Unit 4: Geological Processes

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Text lesson

Formation of Minerals and Soil

Science — Second Preparatory

Formation of Minerals and Soil

Lesson summary

Lesson summary

  • A mineral is a natural, inorganic, solid substance with a fixed chemical composition and a crystal structure.
  • Minerals form by crystallisation from magma, by evaporation of solutions, and by deposition from hot solutions.
  • Mohs’ scale ranks minerals by hardness from 1 to 10.
  • Soil is a loose surface layer made of broken rock, organic matter, water, air and living organisms.
  • The fertility of soil depends on the proportions of sand, silt and clay, and on the amount of organic matter.
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