Natural Selection Crossword
This printable crossword puzzle on the topic of Ecology & Evolution has 15 clues. Answers range from 5 to 15 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.
Description
The outer layer of the lithosphere
When there are natural differences between a population or species.
One of the larger sections into which the lithosphere is broken
A geologic time that has three eons and consists of a lot of Earth's history
Scientists who study fossils
Rock that forms when existing rock is exposed to heat or high pressure
Shortest division of geologic time scale
Shortest division of geologic time scale
Group of organisms that have the same characteristics and can breed together.
A taxonomic group made up of related classes
Fossil that forms a solid copy of the shape of an organism
A break in the Earth's crust
A block of time on the geologic time scale that unique rock layers were made
The study of Earth's history
The amount of time it takes for half of atoms in a radioactive element to decay and form.
