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SubjectPaid lesson

Rock formation.

ClassNotes Team 6 MIN READUPDATED 7 JUL 2026

Agricultural science SSS1 Second Term.

WEEK 10

Rock formation.

Performance objectives.

Students should be able to:

  1. Define Rock
  2. Describe the types and characteristics of different rocks.
  3. Describe the processes of rock formation.
  4. State and explain the economic importance of rocks in agriculture.

Content.

DEFINITION AND TYPES OF ROCKS

Rock is defined as any mineral material of the Earth. The Earth's crust consists of rocks. A rock may be a combination of different mineral elements such as silica which contains silicon and oxygen.

Types of Rocks

All rocks are classified into three major types: igneous, sedimentary and metamorphic rocks, based on the origin, mode of formation and appearance.

All these rocks differ from one another in texture, structure, colour, permeability, mode…