V

valley breeze
An uphill airflow.
variation
Having many differences.
varve
Paired deposit of light-colored, coarser sediments and darker, fine-grained sediments deposited in a glacial lake that represent an annual cycle.
vein
Minerals that cooled from a fluid and filled cracks in a rock.
ventifacts
Polished, faceted stones formed by abrasion by sand particles.
vertebrate
Animals with a backbone.
vesicular
Igneous rock texture with holes that indicate the presence of gas bubbles in the magma.
viscosity
The thickness of a liquid; its resistance to flow.
visible light
The portion of light in the electromagnetic spectrum that is visible to humans.
volcanic rock
Rock that originates in a volcano or volcanic feature.