The puzzles are composed of vocabulary and terms related to geologic time and dating earth history. Includes crossword puzzles (one-sided and two-sided handouts) and a word search.

The crossword puzzle consists of short clues that provide starting points for students to begin investigation.

Keys are included, along with a word list (helpful for students who need extra assistance).

The Preview File provides a sample of the two-page crossword puzzle format.

Note: The puzzles were written using the armoredpenguin.com Internet site.

Word list:
4.6 billion years
Absolute dating
Angular unconformity
Cambrian
Carbon 14
Charles Darwin
Correlation
Crosscutting relationships
Daughter
Disconformity
Epoch
Era
Extinct
Fossil
Fossil succession
Geologic time scale
Half life
Inclusions
James Hutton
Natural selection
Nicolaus Steno
Nonconformity
Original horizontality
Parent
Period
Precambrian
Radioactivity
Radiocarbon dating
Radiometric dating
Relative dating
Superposition
Theory of evolution
Unconformity
Uniformitarianism