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Monday, September 19 th. Please write down Homework: Tier 1 Geological Time due TOMORROW. Tier 1 . Make flashcards from PowerPoint online Interactive Workbook . I . What is the Geologic Time Scale? .

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monday september 19 th

Monday, September 19th

Please write down Homework:

Tier 1 Geological Time due

TOMORROW

tier 1
Tier 1
  • Make flashcards from PowerPoint online
  • Interactive Workbook
i what is the geologic time scale
I. What is the Geologic Time Scale?

a. Based on their interpretations of the rock record, geologists have divided Earth’s 4.56-billion-year history into units that represent specific amounts of time. Taken together, these time spans make up the geologic time scale.

i what is the geologic time scale1
I. What is The Geologic Time Scale

b. The geologic time scale is divided into sections based on fossil evidence.

c. Organisms have become more complex over time.

d. Geologic time divisions represent changes in the fossil evidence.

slide5

II.Measuring Geologic Time

A. Eras (largest divisions)

1. Precambrian – earliest,

4 billion years

2. Paleozoic – 345 million years

3. Mesozoic – 160 million years

4. Cenozoic – current, so far

65 million years

slide6

B. Eras are divided into

periods (except for Precambrian)

  • Cenozoic periods are divided

into epochs

slide8

III. Geologic Eras

A. Precambrian

1. Earth forms including

seas & mountains

2. Few fossils of jellyfish,

worms, bacteria, algae,

& fungi

slide9

Paleozoic – 6 periods

1. Invertebrates most common

a. Trilobites

b. Brachiopods

2. Vertebrates – fish and

amphibians

3. Plants – ferns and trees in

swampy areas

eryops
Eryops

Eryops

slide19

Mesozoic – 3 periods

1. Pangaea began to break

apart

2. Cycads & conifers evolved

3. “Age of the Reptiles”

4. Dinosaurs became extinct

slide23
Cenozoic – 2 periods

1. “Age of Mammals”

2. At least 4 ice ages

question of the day
Question of the Day

How would a new era start?!?!

fossil project
Fossil Project

Project – You should have finished Stage 1 and 2 and be working on Stage 3.

  • Stage 1: Paragraph about each scientists for a total of 3 paragraphs
  • Stage 2: Fossilization Process: illustrated and described. Pick ONE fossil to describe and illustrate
  • Stage 3: DEFEND your 3 fossil discoveries… Why are they the MOST important, and to whom? Plot each on an outline map.
earth time scale
Earth time Scale
  • you and your partner will complete 1 timeline that shows all the different eras.
  • Make sure to write the event and the number of years ago!