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BELLWORK. You found a mineral that can scratch quartz but can be scratched by corundum. What mineral do you possibly have?. ESSENTIAL QUESTION. How are rocks formed and classified?. Vocabulary. Rock cycle

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  • You found a mineral that can scratch quartz but can be scratched by corundum. What mineral do you possibly have?

Essential question


  • How are rocks formed and classified?



  • Rock cycle

    • the series of processes in which a rock forms, changes from one type to another, is destroyed and forms again by geological processes.

  • Rock

    • a naturally occurring solid mixture of one or more minerals or organic matter.

  • Erosion

    • The process by which wind, water, ice, or gravity transports soil and sediment from one location to another.



  • Deposition

    • The process in which material is laid down.

  • Composition

    • The chemical makeup of a rock; describes either the minerals or other materials in the rock.

  • Texture

    • The quality of a rock that is based on the sizes, shapes and positions of the rock’s grains.


Fine-grained Siltstone

Medium-grained Sandstone

Coarse-grained Conglomerate

The rock cycle

The Rock Cycle

Weathering and Erosion

Compaction and Cementation

Heat and Pressure



Classification of rocks

Classification of Rocks

  • Rocks are classified 2 ways:

    • Composition – what the rock is made of

    • Texture – The size and shape of the grains

Da rock cycle

Da Rock Cycle



  • How are rocks classified (2 ways)?

  • Name 3 things that can happen to a rock during the rock cycle.

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