1. 8. Geologic Time
Essential Question: How do rock layers and fossils provide a record of Earth’s geologic history & the evolution of life?
Learning Target: I can analyze how rock layers and fossils provide evidence of Earth’s history
Learning Task: I will interpret data and draw conclusions for rock layers.
I will correctly sort Geologic Vocab.
I will understand how fossils show Earth’s continents movements.

2. Welcome! Warm Up Wednesday 4/10/13 Week of 4/7 – 4/11
What is an index fossil?
How are they important to relative dating?

3. Sign up with PBIS for next Pride Party

4. Table Talk 1. What is relative dating?
2. Can it tell us the exact age of a fossil?
3. Why is it useful?

5. 4th Quarter Table of Contents 1
Title Assignment #
Ice Cores
Ice Core Webquest 3
Fossil Notes
Getting into the Fossil Record 5
Fossil Vocab
Fossils over Time (Molds vs Casts) 7
Law of Superposition Vocab 8
Who’s on First? (Wkst) 9
Geologic Time VOCAB

6. Law of Superposition VOCAB 8
Law of superposition – the idea that rocks and fossils found in lower layers are older than the rocks and fossils found in the top layers
relative dating – a method of dating rocks which can’t give us an actual age, but can tell us whether a rock layer is older or younger than another
strata – a certain rock layer
unconformity - gaps in rock layers and/or the fossil record
intrusion - a rock layer that forms when magma hardens beneath Earth’s surface
extrusion - a rock layer that forms when lava flows onto Earth’s surface and hardens
radiometric dating – using radioactive elements found naturally in substances in order to determine how old they are.
absolute age – the actual age of a rock or fossil

7. Extension:
Google Drive: 8.Finding Clues to Rock Layers Skills Lab Wkst
Complete the Skills Lab in our book on page 330, and answer
Site 1 (#2, 3, 4 & 5)
Site 2 (#6, 7, &8)

8. Geologic Time VOCAB 10 Obtain a set of vocab cards from your teacher
Match the correct definition to each vocab word
Check with your teacher that you are correct
Record your vocab on page 10 in your Lab Notebook

9. Geologic Time Vocab 10
Geologic Time Scales - a record of the life forms and geologic events in Earth’s history
Era - a unit of geologic time that includes two or more periods
Period - a subdivision of an era
Continental Drift - the theory that states that the gradual shifting of Earth’s plates causes continents to move over time
Pangaea - The name of the big landmass that broke apart into the current continents
Plate Tectonics - large pieces of the Earth’s outermost layer (called tectonic plates) move and change shape

10. Geologic Time Webquest
ucation/explorations/tours/stories/ middle/intro.html

11. Exit Ticket
Which period in Earth’s history would you most like to time-travel to? Why?