Science vocab

12345678910
Across
  1. 3. the diminishing of a conditioned response; occurs in classical conditioning when an unconditioned stimulus (US) does not follow a conditioned stimulus (CS); occurs in operant conditioning when a response is no longer reinforced.
  2. 6. selection Selection by humans for breeding of useful traits from the natural variation among different organisms
  3. 8. scale used by paleontologists to represent evolutionary time
  4. 10. Change over time
Down
  1. 1. A change in a gene or chromosome.
  2. 2. Chronological collection of life's remains in sedimentary rock layers
  3. 4. Any difference between individuals of the same species.
  4. 5. selection A natural process resulting in the evolution of organisms best adapted to the environment.
  5. 7. inherited characteristic that increases an organism's chance of survival
  6. 9. A trace of an ancient organism that has been preserved in rock.