Grade 4, Science Olympiad (CBSE) - Rocks 

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Grade 4  |   Science  |   Rocks, Our Environment, Olympiad, CBSE, ICSE, SOF, ITO

Rocks

3 types of rocks :

  • Igneous rocks are formed by cooling of molten rocks or magma. Granite and basalt are igneous rock.
  • Sedimentary rocks are formed by deposition and accumulation of sediments of small rocks, dust, soil and organic matter over time.
    Sandstone, chalk and limestone are sedimentary rocks.
  • Metamorphic rocks are formed when existing rocks like igneous rocks or sedimentary rocks are subjected to extreme heat and pressure over a long period of time.
    Marble, quartzite and slate are metamorphic rocks.
    Marble is formed by metamorphosis of limestone.

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