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Variations and Fossil Formation
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variation:a difference
mutation:a change
naturalselection:survival of the fittest
fossil:living thing imprint in rock
absoluteage:age of fossil in years
relativeage:age of a rock compared to another rock
antibiotics:kill disease-causing bacteria
Smilodon:fossilized animal similar to a tiger
lawofsuperposition:each layer of rock is older than the one above it
halflife:time for an element to be cut in half
eras:units of time in millions of years
periods:amounts of time in an era
Darwin:studied variations in finches
survival:living on
finches:birds Darwin studied
Cenozoic:era we live in
Variations and Fossil Formation
Across:1. | era we live in | 4. | survival of the fittest | 6. | fossilized animal similar to a tiger | 8. | studied variations in finches | 9. | living on |
| 12. | amounts of time in an era | 14. | a change | 15. | age of a rock compared to another rock | 16. | living thing imprint in rock |
| | Down:2. | units of time in millions of years | 3. | kill disease-causing bacteria | 5. | each layer of rock is older than the one above it | 7. | time for an element to be cut in half |
| 10. | age of fossil in years | 11. | birds Darwin studied | 13. | a difference |
| |
© 2012
PuzzleFast.com, Noncommercial Use Only
Variations and Fossil Formation
Across:1. | era we live in | 4. | survival of the fittest | 6. | fossilized animal similar to a tiger | 8. | studied variations in finches | 9. | living on |
| 12. | amounts of time in an era | 14. | a change | 15. | age of a rock compared to another rock | 16. | living thing imprint in rock |
| | Down:2. | units of time in millions of years | 3. | kill disease-causing bacteria | 5. | each layer of rock is older than the one above it | 7. | time for an element to be cut in half |
| 10. | age of fossil in years | 11. | birds Darwin studied | 13. | a difference |
| |
© 2012
PuzzleFast.com, Noncommercial Use Only