Science 8 iWork Menu 3

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Across
  1. 2. column ideal sequence of rock layers that contains all of the known fossils and rock formations on Earth
  2. 3. the preservation and wise use of natural resources
  3. 5. happens when the number of individuals becomes so large that the individuals can't get the resources they need to survive
  4. 8. remains or imprints of once living organisms found in layers of rock
  5. 10. period of inactivity and decreased body temperature that some animals survive on stored body fat
  6. 12. selection the process by which individuals that are better adapted to their environment survive and reproduce more successfully than less well adapted individuals do
  7. 13. cavity in rock where a plant or animal was buried
  8. 14. an area that is occupied by one animal or by a group of animals that do not allow other species to enter
Down
  1. 1. unwanted change in the environment caused by substances such as waste
  2. 3. the principle that states that all geologic change occurs suddenly
  3. 4. characteristic that improves an individual's ability to survive wand reproduce in a particular environment
  4. 6. the period of reduced activity in the summer
  5. 7. form of a hereditary characteristic
  6. 9. time the average time between one generation and the next
  7. 11. group of organisms that can mate with another to produce fertile offspring