Geology Quiz & Flashcards

Water facilitates chemical reactions that alter the minerals in rocks.

Igneous rocks form from cooled and solidified magma.

Earthquakes are primarily caused by the movement of tectonic plates.

Hardness measures a mineral's resistance to being scratched.

Sedimentary rocks are formed through the process of sedimentation.

Metamorphic rocks often have a crystalline texture due to recrystallization.

Limestone is primarily composed of calcite.

Sedimentary rocks often contain fossils because they form in layers where organisms are buried.

The Mohorovičić discontinuity, or Moho, is the boundary between the crust and mantle.

Basalt is the primary rock type found in oceanic crust.

Stratification is the layering that occurs in sedimentary rocks.

Convection currents in the mantle drive the movement of tectonic plates.

A volcanic arc often forms due to subduction of an oceanic plate under a continental plate.

Lithification is the process of compacting and cementing sediments into rock.

A common misconception is that the inner core is liquid, but it is actually solid.

Composite volcanoes are known for their explosive eruptions due to trapped gases.

Magma is the term for molten rock beneath the Earth's surface.

Fjords are deep, glacially carved valleys that are flooded by seawater.

Subduction of oceanic plates leads to the formation of deep ocean trenches.

Diamond is the hardest known natural material.

Chemical weathering primarily leads to the dissolution of minerals and chemical alteration.

The outer core is composed mostly of iron and nickel.

Sedimentary rocks commonly exhibit layering due to the deposition of sediments.

Strike-slip faults involve horizontal movement along the fault line.

Metamorphic rocks form from existing rocks altered by heat and pressure.

Silicon is a major component of Earth's crust, often combined with oxygen in silicate minerals.

Igneous rocks form through the melting of materials followed by cooling and solidification.

Metamorphic rocks are altered forms of existing rocks due to heat and pressure.

Magma is located beneath the Earth's surface, while lava is magma that has reached the surface.

A delta forms from the accumulation of sediments where a river meets a body of water.

Basalt forms directly from the cooling of lava on the Earth's surface.

Crustal subsidence allows for the accumulation of sediments in sedimentary basins.

Slate is a foliated metamorphic rock, showing a layered structure.

Not all volcanoes erupt explosively; some have gentle lava flows.

Talc is the softest mineral on the Mohs hardness scale.

Erosion involves the movement of sediment by natural forces like water, wind, or ice.

Extrusive igneous rocks cool quickly on the surface, resulting in a fine-grained texture.

Heat and pressure alter sedimentary rocks into metamorphic rocks.

Sedimentary rocks can form from biological processes, such as the accumulation of shells.

The layers of Earth's interior are often referred to as 'shells'.

Mid-ocean ridges form due to sea-floor spreading where new crust is created.

Physical weathering involves the mechanical breakdown of rocks without chemical change.

Radiometric dating is a common method used to determine the age of rocks and fossils.

Shield volcanoes have broad, gentle slopes due to fluid lava flows.

Granite forms from magma cooling slowly below the Earth's surface.

Luster describes how a mineral reflects light, such as metallic or glassy.

A caldera forms when a volcano erupts and collapses into the emptied magma chamber.

Canyons are typically formed by the erosive action of rivers cutting into land.

Quartz is a primary mineral found in granite, along with feldspar.