Chapter 10.notebook
March 16, 2016
A Trip
Through
Geologic
Time
Feb 15­9:05 AM
1
Chapter 10.notebook
March 16, 2016
Lesson 1
Essential Questions:
1­What is the Geologic Time Scale?
2­Why is a time scale used instead of a
calendar?
Feb 15­10:36 AM
2
Chapter 10.notebook
March 16, 2016
Planet Earth is approximately
____________
years old.
Feb 15­10:41 AM
3
Chapter 10.notebook
March 16, 2016
Can we measure Earth's history using a calendar?
Feb 15­10:51 AM
4
Chapter 10.notebook
March 16, 2016
What is the Geologic Time Scale?
http://www.scienceviews.com/dinosaurs/geologictime.html
Feb 15­10:54 AM
5
Chapter 10.notebook
March 16, 2016
Feb 15­11:03 AM
6
Chapter 10.notebook
March 16, 2016
Geologic Time Scale Song (4:00)
http://www.youtube.com/watch?v=jk9hPP2hC_I&feature=related
Feb 15­11:02 AM
7
Chapter 10.notebook
March 16, 2016
Lesson 2
Essential Questions:
1­How can the remains of living
organisms be preserved in rock?
2­What is relative age?
3­What makes a good "index fossil"?
Feb 15­9:53 AM
8
Chapter 10.notebook
March 16, 2016
Feb 15­2:47 PM
9
Chapter 10.notebook
March 16, 2016
What are fossils?
Fossils are the preserved remains or traces of living things
Fossils provide evidence of how life has changed over time
Fossils can also provide clues about past climates
Fossils are clues to the changes that have occurred to Earth's surface
How Fossils are Formed (2:40)
http://www.blinkx.com/watch­video/how­fossils­are­formed/r0oO­PRMmIgUWcHHhgSiIQ
Feb 15­9:58 AM
10
Chapter 10.notebook
March 16, 2016
Types of Fossils
Molds Cast
fossil formed when an organism buried in sediment dissolves leaving a hollow area fossil that is a copy of an organism's shape formed when minerals seep into the ground
Petrified
fossil in which minerals replace all or part of the organism
Trace
Resin
fossil that provides evidence of
the activities of the organism
(footprints)
fossils that have been preserved
in amber or sap Feb 15­10:01 AM
11
Chapter 10.notebook
March 16, 2016
Law of Superposition:
In horizontal sedimentary rocks layers, the oldest rock is at the bottom. Each
higher layer is younger than the one below it.
Feb 15­2:46 PM
12
Chapter 10.notebook
March 16, 2016
http://www.youtube.com/watch?v=TVwPLWOo9TE
http://www.youtube.com/watch?v=Me­BnGrrygk
Feb 15­3:38 PM
13
Chapter 10.notebook
March 16, 2016
Relative vs. Absolute Age
The absolute age of a rock is the number of years since the rock formed
The relative age of a rock is its age compared to the age of other rocks
Feb 15­2:31 PM
14
Chapter 10.notebook
March 16, 2016
What makes a good index fossil?
http://www.enchantedlearning.com/subjects/dinosaurs/glossary/IndexFossils.shtml
http://www.phschool.com/atschool/phsciexp/active_art/index_fossils/index.html
Feb 15­3:57 PM
15
Chapter 10.notebook
1
March 16, 2016
2
D
3
4
5
Z
O
Y
C
N
B
X
M
A
W
Feb 15­6:53 PM
16
Chapter 10.notebook
March 16, 2016
Feb 15­10:01 PM
17