Fossils Crossword
This printable crossword puzzle on the topic of Ecology & Evolution has 20 clues. Answers range from 3 to 21 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
who studies fossils
when a species dies off
a scale that describes time and relationships of events
fossils being compared to other to estimate an age
finding an absolute age
a time period in history
a proportion in time
a spherical structure formed by heating amino acids
a fossil that can only be seen under a microscope
a theory that says eukaryotic cell contain many prokaryotic cells
an extinction of a large number of species
similar features found in different species
the making of a new species
changes from simple to more complex forms
a trace of life
the ability to reproduce and survive
an organ that is not needed
survival of the fittest
natural selection
two species that can't mate because they can't hear each other
