1.  Each kind of organism is called a ___________________

2.  _____________________ are organisms with a simple cell structure.

3.  Most fossils form in _______________________ rock.

4.  A ______________________ is a fossil formed from petrified waste materials of  animals.

5.  _________________________ are animals without backbones.

6.  The first dinosaurs appeared during the ________________________ era.

7.  Radioactive isotopes are used to determine the ____________________ of fossils.

8.  Darwin’s hypothesis that states that organisms best adapted to their environment survive to  pass their traits on  to the next generation is called ___________________.

9.  The principle of ____________________ states that younger rock layers form on top of older rock layers.

10. The three most recent periods of the Mesozoic era are ___________________, ______________________, and ___________________.

11.  Ancestors of most modern mammals evolved during the ________________ era.

12.  _____________ fossils are mineralized copies of organisms or parts of organisms.

13.  Footprints, tracks, and trails are examples of __________________.

14.  An insect trapped in amber is an example of an___________ _______________.

15. The half life of a radioactive isotope is the amount of time it takes for ___________ of its atoms to decay.

16. When the hard parts of an organism leave a cavity or a hole a ______________ is formed.

17. Organisms are classified into five large groups or _________________.

18. __________________ is the process by species change over time.

19. The five groups in the modern classification system of organisms are _____________, ______________, ______________, ______________, __________

20. Humans evolved during the ___________________ era.

21. All members of a species have like ______________ and are able to reproduce.

22. Mushrooms, yeasts, and molds are classified as _________________.

23. When minerals seep in and fill a mold , a fossil called a ____________ is formed.

24. The ___________________ _____ of a fossil is determined by comparing the age of one fossil to another.

25. Radiometric dating is used to determine the ___________________ age of a fossil.
 

ANSWERS CHAPTER 13 REVIEW

1.  Each kind of organism is called a __species_______

2. _Monerans_____ are organisms with a simple cell structure.

3.  Most fossils form in ___sedimentary___ rock.

4.  A _coprolite__ is a fossil formed from petrified waste materials of animals.

5.  _invertebrates__ are animals without backbones.

6.  The first dinosaurs appeared during the _____Mesozoic___ era.

7.  Radioactive isotopes are used to determine the __half-life__ of fossils.

8.  Darwin’s hypothesis that states that organisms best adapted to their environment survive to pass their traits on to the next generation is called ___natural selection__.

9.  The principle of __superposition__ states that younger rock layers form on top of older rock layers.

10. The three most recent periods of the Mesozoic era are _Mississippian_, ___Pennsylvanian__, and ___Permian___.

11. Ancestors of most modern mammals evolved during the __Cenozoic_ era.

12. ___Petrified__ fossils are mineralized copies of organisms or parts of organisms.

13. Footprints, tracks, and trails are examples of trace fossils__.

14. An insect trapped in amber is an example of an_unchanged_ fossil_.

15. The half life of a radioactive isotope is the amount of time it takes for ____half__  of its atoms to decay.

16. When the hard parts of an organism leave a cavity or a hole a __mold__ is formed.

17. Organisms are classified into five large groups or __kingdoms__.

18. ___Evolution___ is the process by species change over time.

19. The five groups in the modern classification system of organisms are __Monerans_, __Protists__, ___Fungi__, __Plants__, _Animals__

20. Humans evolved during the __Cenozoic__ era.

21. All members of a species have like __traits__ and are able to reproduce.

22. Mushrooms, yeasts, and molds are classified as _fungi__.

23. When minerals seep in and fill a mold , a fossil called a __cast__ is formed.

24. The ___relative___ age__ of a fossil is determined by comparing the age of one fossil to another.

25. Radiometric dating is used to determine the __absolute__ age of a fossil.