geological change (term 3)

Tectonic plate

A large piece of earths lithosphere that moves slowly over the mantle

Continental drift

Theory that continents move slowly across earths surface over time

Mantle

Thick Layer of hot, solid rock between earths crust and core

Crust

Earths outermost layer of solid rock

Lithosphere

Outer layer made of crust and uppermost mantle

Core

Earths hot and dense central layer made up of mostly iron and nickel

Mantle convection

Movement of hot and cold materials that drives plate movement

Earthquake

Sudden shaking of earths surface caused by movement in the crust

Volcano

Opening in the earths crust where lava and gases escape

Geological change

A change to earths rock landforms or structure over time

Mineral

Natural occurring inorganic solid with a specific chemical composition

Rock

Naturally formed solid made of one or more minerals

Sedimentary

Rocks formed when layers of sediment are cemented together

Igneous

Rock formed when molten rock cools and solidifies

Metamorphic

Rocks changed by heat pressure or chemically active fluids

Law of superposition

Rock layers youngest is at the top while the oldest later is at the bottom

Relative age

Age of something compared with the ages of other objects or events

Element

Pure substance made up of only one atom

Planet

Large nearly spherical object that orbits a star and doesn’t produce its own light

Sediment

Small and loose pieces of