The Best Crossword Puzzle Maker Online
Powered by BrightSprout
Save Status:
or to save your progress. The page will not refresh.
Controls:
SPACEBAR SWITCHES TYPING DIRECTION
Answer Key:
Edit a Copy:
Make Your Own:
Crossword Word Search Worksheet
Rate This Puzzle:
Log in or sign up to rate this puzzle.

Determining Age Vocab Choice

Ryan Sookram
Across
An Ammonoid that belongs to the order Ammonitida, typically having elaborately frilled suture lines.
Younger rocks are on top and older rocks are on the bottom.
Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
The determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains. The ratio between them changes as radioactive carbon-14 decays and is not replaced by exchange with the atmosphere.
Emitting or relating to the emission of ionizing radiation or particles.
The rocks age in specific years.
Down
A method of dating Geological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
The spontaneous transformation of an unstable atomic nucleus into a lighter one, in which radiation is released in the form of alpha particles.
Indicates that one layer is older or younger than another layer.
The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.