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