Science Cross Word Puzzle

The actual age of a rock or fossil or how long ago it formed
Radioactive form of the element carbon that have been used to determine the absolute age of recent fossils and geologic events
a fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits
Vertical fault where motion is up and down (vertical)
An igneous rock layer formed when lava flows onto the earths surface and hardens
A break or crack in earths surface along which movement occurs
The time required for half of the amount of radioactive parent element to decay into a stable daughter element
A cylinder of ice removed from an ice sheet
Forms when melted rock cools
Fossils of widely distributed organisms that lived only during one short period
An igneous rock layer formed when magma hardens beneath earths surface
The principle in undisturbed rock layers,older layer of rock lie beneath younger rock layers
Rock that forms when existing rock is exposed to high pressure or high heat or both
The impression of an organism in am rock
A meanas of measuring the age of a material by comparing the amount of a radioactive form of an element with the amount of its decay product
The age of a rock or fossils described in comparison to that of another rock or fossils
Rock that forms from compacted sediment
Vertical fault where motion is horizontal
The surface where a new rock layer meets a much older rock surface a gap in the geologic record
The belief that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe