Final Review #1

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Across
  1. 4. The rapid increase in different species during the Phanerozoic Eon.
  2. 5. Fossil that includes only bones or teeth.
  3. 8. How tightly packed something is.
  4. 9. Meteor that crashes on Earth.
  5. 14. Humans.
  6. 15. The first step in planet formation.
  7. 17. The metric system unit measurement for length.
  8. 19. Study of fossils.
  9. 21. A large expanse of land.
  10. 22. The area of space where Pluto is located.
  11. 25. Egg that allows reptiles to live on land.
  12. 26. The system that includes all the frozen water on Earth.
  13. 27. The planet type Pluto is categorized as.
Down
  1. 1. The preserved remains of organisms.
  2. 2. Planet closest to the Sun.
  3. 3. The extinction that killed the dinosaurs.
  4. 6. The planet most explored besides Earth.
  5. 7. Statement of what you think will happen in an experiment.
  6. 9. The majority of species alive on Earth die.
  7. 10. Force that keeps the planets circling the Sun.
  8. 11. Animal that spends half its time on land and in the water.
  9. 12. Information you collect during an experiment.
  10. 13. The measurement of how much space a liquid takes up.
  11. 16. Type of planets made up of gas.
  12. 18. Walking up right.
  13. 20. Study of the ocean.
  14. 23. How long it takes a radioactive isotope to decay.
  15. 24. Study of tree rings.