"English from the Roots Up"
Lesson Eighty Nine


zoo a zoological park or collection of animals
zoology (logos - word, study) - study of animals
protozoon (protos - first) - earliest form of one-celled animal life on earth
cenozoic (kainos - recent) - recent animal period
mesozoic (meso - middle) - middle animal period
paleozoic (paleo - early, archaic) - early animal period (many fossils)
proterozoic (protero - earlier) - earlier animal period (few fossils; worms)
archeozoic (arche - beginning) - beginning animal period (carbon traces but no fossils)

Teaching Notes: A zoo (abbreviation for zoological park) is where exotic animals are kept so people can study them.

Protozoa (plural), or first one-celled animals, are very interesting to study. They reproduced by dividing themselves into two new cells, a process called "mitosis".

The five great divisions in the chart of geologic time are very useful for students to know. They date from the beginning of life on earth and are named and dated according to the animal fossils which have been discovered in rocks which were formed during the various periods. The rock formations laid down during the first period, the archeozoic, had traces of carbon showing animal life too soft to leave fossils. The formations of the other periods are rich in fossils. WE live in the cenozoic era!

Extra Words: Zodiac comes from the Greek word zodion-a diminutive form of zoon. When the Greeks spoke of zodiakos, you were to understand kyklos, the "zodiac circle". The ancients imagined a belt of constellations in the sky surrounding the earth which extended 8 or 9 degrees on each side of the sun's apparent path around the earth. The original signs of the zodiac were all animals, but they changed over time. The signs: Aries (ram), Taurus (bull), Gemini (twins), Cancer (crab), Leo (lion), Virgo (virgin), Libra (scales), Scorpio (scorpion), Sagittarius (archer), Capricorn (goat), Aquarius (water carrier), Pisces (fish). There are interesting legends about them all.

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Copyright 1989 by Joegil Lundquist
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