Science Rocks

Year 8

Igneous Rocks

Rocks formed from the solidification of molten material, either magma or lava when it solidifies. They are classified into two main types: intrusive and extrusive.

Sedimentary Rock

Rocks formed from the accumulation and cementation of mineral and organic particles, typically occurring in layers when rock weather, erosion and deposition. They can contain fossils and are often characterized by their layered appearance.

Metamorphic Rocks

Rocks that have been transformed by heat, pressure, or chemically active fluids, changing their mineral composition and structure. They may originate from igneous or sedimentary rocks.

Name 3 Sedimentary Rocks

Examples include sandstone, limestone, shale and conglomerate

Name 3 Igneous Rocks

Examples include granite, basalt, pumice.

Name 3 Metamorphic Rocks

Examples include schist, gneiss, and marble.

Sediment

Small pieces of rock shell or organic material

Weathering

Breaking down of rocks into different sediments

Erosion

Moving sediment by wind, water, ice, gravity.

Deposition

Dropping sediment

Compaction

Sediment squeezed together

Cementation

Minerals glue together

Lithification

Sediment turns into rock

Sedimentary rock

Rock formed from compacter and cemented sediments

Clast

A fragment of rock in a sedimentary rock