Science Ch 7 Section 3-6

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Author:
codymcc
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128316
Filename:
Science Ch 7 Section 3-6
Updated:
2012-01-16 21:14:41
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Vocab
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Science
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  1. the process in which the nuclei of radioactive elements break down releasing fast, moving partices and energy
    radioactive decay
  2. the time it takes for half of the atoms of a radioactive element to decay
    half-life
  3. a record of the geologic events and life forms in Earth's history
    geologic time scale
  4. one of the three long units of geologic time between the Precambrian and the present
    era
  5. a horizontal row of elements in the perodic table or oneof the units of geologice time into which geologist divide eras
    period
  6. a loose collection of ice and dust that orbits the sun, typically in a long narrow orbit
    comet
  7. an animal without a backbone
    invertebrate
  8. an animal with a backbone
    vertebrate
  9. a vertebrate whose body temperature is determined by the temperature of its environment and that lives its early life in water and its adult life on land
    amphibian
  10. a vertebrate whose temperature is determined by the temperature of its environment, that has lungs and scaly skin, and that lays eggs on land
    reptile
  11. when many types of living things become extinct at the same time
    mass extinction
  12. a vertebrate whose body temperature is regulated by its internal heat, and that has skin covered with hair or fur and glands that produce milk to feed its young
    mammal

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