Aliens Project Crossword

This printable crossword puzzle on the topic of Astronomy & Space has 16 clues. Answers range from 3 to 16 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

a region characterized by specific plants and animals
material present in nearly all living organisms
simple organic compound
an energy source of the body
contracting mass of gas that represents an early stage in the process of a star
nucleic acid present in all living cells
carrying genetic information in the form of genes
transferred from a parent to offspring
resulting from or showing the effect of mutation.
a cloud of gas and dust in outer space
occurs in binary systems
results from the rapid collapse and violent explosion of a massive star
include the bacteria and cyanobacteria.
process whereby organisms better adapted to their environment tend to survive and produce more offspring
include all living organisms other than the eubacteria and archaebacteria.
planet that orbits a star outside the solar system