Friday, September 23, 2011
Monday, September 26, 2011
Complete Determining Which is Older Worksheet
Warm Up: Copy and Match definition with term
. Name the three types of rocks AND describe how
each is formed
a. ___________ - ______________________
b. ___________ - _______________________
c. ____________ - _____________________
In which layer would you expect to find the most
fossils? Why?
Homework: 1. Color each rock layer and Complete
Friday, September 23, 2011
Monday, September 26, 2011
Law of Superposition
Relative Ages of Rocks Activity
Law of Superposition - The law states that strata that
are younger will be deposited on top of strata that are
older, given normal conditions of deposition.
•if undisturbed, oldest on the bottom and
youngest on the top
Strata – horizontal layers of rocks
Unconformity - a buried erosion surface separating two
rock masses or strata of different ages (this is where the
pattern changes)
Intrusions and Extrusions: Make of Igneous Rock and
always younger than the rock layer it cut through
Movement of Tectonic plates can disturb layers
•Can bend layers like a taco
•Molten lava can cut through layers
Determining Which is Older worksheet
Page 21
Page 22
Tuesday, September 27, 2011
Wednesday, September 28, 2011
Tuesday, September 27, 2011
Wednesday, September 28, 2011
Complete Radioactive Dating Activity Graph and Questions
Read Section 2.3 of Unit A in textbook (Answer ?’s 1-3)
Radioactive Dating, Half Life and Absolute Age Notes
“Sweet” Radioactive Simulation
**Please have your Determining Which is Older
worksheet out so I can check it. If you have your
progress report, please put it on the supply box.
Radioactive Decay- When rocks contain unstable
elements that break down releasing particles and
energy
- Radioactive elements only occur in igneous
rocks that are formed by magma.
- As soon as the igneous rock is formed, it
starts to decay and change into another
element.
Half Life – the time it take for half of the
radioactive atoms to decay
- constant for each element
- Carbon’s Half Life = 5,730 years
- used to date living organisms
- Potassium- 40’s Half Life = 1.3 billion yrs
Warm Up:
1.
When studying an undisturbed rock core, how do
you know which is the oldest and youngest rock
layer?
2.
When might the youngest layer in sedimentary
rock not be on the top?
3.
Can you determine the exact age of rock by
studying layer positions?
4.
Use what you have learned last period to write a
definition for relative age.
Homework: 1. Create Graph from Radioactive Activity
2. Answer the questions that go with the
activity from class.
3. Read Section 2.3 of Unit A of textbook
- Answer questions 1-3
Page 23
Absolute Age - Geologists use radioactive
dating to calculate the absolute ages of rocks
- Moon rocks = 4.6 billion years old
Absolute Age vs. Relative Age
Page 24
Technology Used to Measure
Radioactivity
Geiger Counter
Ionization Chamber
MicroR Meter
Half-Lives
• Almost always need to make a chart to visualize
Original
Rock
1 Half Life
2 Half Lives
3 Half Lives
4 Half Lives
Half Lives
Percentage of
Radioactive
Material in Rock
Number of Half
Lives
100% - 50%
1
50% - 25%
2
25% - 12.5 %
3
12.5% - 6.25%
4
6.25% - 3.126%
5
50%
decayed
50%
Radioactive
One Half Life
Element Brennan is found in an
igneous rock and we are trying
to determine the rocks age.
We know Brennan’s half life is
approximately 3,000 years and
that the rock is currently 50%
25%
6.25%
radioactive.
How old is the rock?
100% Radioactive
Igneous Rock
75% decayed
87.5% decayed
94% decayed
25% r-a
Two Half Lives
Three Half Lives
Four Half Lives
Half-Lives
Last Practice Question:
A rock contains a radioactive element with
a half life of 100 million years. Tests show
that the element in the rock has gone
through three half lives.
How old is the rock?
Japan
Radioactive ways can be harmful to our health
Ticket Out the Door
• Make a Venn Diagram to compare and
contrast absolute and relative age.
– Which does radioactive decay fall under?
– Which does law of superposition fall under?
Thursday, September 29, 2011
Friday, September 30, 2011
Thursday, September 29, 2011
Friday, September 30, 2011
Work on Castle Learning Assignments
Prepare your Notebook for a Upcoming Check!!
Index Fossil Notes
Index Fossil Activity
Warm Up: Put rock layers in order from oldest to
youngest. Explain your reasoning.
2
D
1
Fossil Formation – An organism that was fossilized
in rock must have lived during the same time span
in which the rock formed.
-Scientists have determined when specific
fossilized organisms lived
-Knowing this helps determine rocks age
C
B
E
A
3
H
I
F
G
J
K
L
L
M
M
N
N
O
P
Homework: 1. Work on Castle Learning Assignments
2. Prepare your notebook for a check!
Page 25
Index Fossils – Organisms that lived in many areas
during only a specific time span (extinct now)
- Knowing the time span that organism
lived, can help to estimate the rocks age
- Can be used to compare the ages of rock
layers in different parts of the world
Example – Mollusk Inoceramus labiatus is a
sea creature that lived many years ago
- It appeared on Earth 144 million years ago
- It became extinct 65 million years ago
- If we find a rock layer that has this fossil in
it, we know the rock is between the ages of
144 and 65 million years old
Page 26
Monday, October 3, 2011
Tuesday, October 4, 2011
Study for Quiz on Determining Rock Age
Monday, October 3, 2011
Tuesday, October 4, 2011
Notebook Check (1-26)
Centers
Warm Up:
1. Make a Venn Diagram to compare and contrast
absolute and relative age.
Don't forget to include radioactive decay
law of superposition
carbon-14
index fossils
half- lives
2. A rock contains a radioactive element with a half life
of 100 million years. Tests show that the element in the
rock has gone through three half lives.
How old is the rock?
Homework: 1. Study for Quiz!
Page 27
Page 28
Wednesday, October 5, 2011
Thursday, October 6, 2011
Section 2.3 Word Triangles: Uniformitarianism, Geologic
Time Scale, Eon, Era, Period and Epoch
Research assigned Era for Geologic Time Project
Wednesday, October 5, 2011
Thursday, October 6, 2011
Rock Age/Layers/Fossils Quiz
Epoch Article
Launch Geologic Time Project
Warm Up: Complete the Standardized Test Practice
activity on page 73A. Complete 1 - 5.
Homework: 1. Section 2.3 Word Triangles: Uniformitarianism,
Geologic Time Scale, Eon, Era, Period and Epoch
2. Research assigned Era for Geologic Time Project
Page 29
Page 30
Friday, October 7, 2011
Monday, October , 2011
Friday, October 7, 2011
Monday, October , 2011
Conduct Outside Research on your Era
Geologic Time Notes
Project Start Date
Warm Up: Match the vocabulary word to the correct
definition:
1. Uniformitarianism
2. Eon
3. Epoch
4. Period
5. Geologic Time
6. Era
Geologic Time Scale – Divides Earth’s history into
intervals of time defined by major events or
A. Each is divided into changes on Earth
periods
B. Are divided into
Uniformitarianism – theory that states:
epochs
- Earth is an always- changing place
C. time intervals
- The same forces of change at work
defined by major
today were at work in the past
events on Earth
D. The idea that Earth
is always changing
E. The largest unit of
time
F. Smallest unit of
time
Homework: 1. Conduct outside research on your Era
Eon
Era
Period
Epoch
Page 31
Page 32
Geologic Time Scale
Cambrian Boundary
Precambrian Time
4.6
BYA
Precambrian Time
544 245 65
MYA MYA MYA
1st Humans Evolved: Quaternary Period
Tuesday, October 11, 2011
Wednesday, October 12, 2011
Read Pages 12 – 25 of Unit B and define
Section 1.1 and 1.2 of Unit B Vocabulary words
Be Prepared to Discuss Reading
Warm Up: DON’T WRITE OUT THE WARM UP – JUST DO IT!!
1. Use the folders at your table to describe
one geologic event and one life event for the
Jurassic Period.
2. Knowing what you accomplished last
class, set a goal for yourself to achieve
success on your project. Create a numbered
“to-do” list of what you need to do in class
today.
Tuesday, October 11, 2011
Wednesday, October 12, 2011
Geologic Time Project – Last Day!
Goals for Today
1. Work Hard
2. No Socializing
3. Ask your group for help
4. USE YOUR CHECKLIST
5. Ask me for help if you need it!
Homework: 1. Read pages 12 – 25 of Unit B and define
Section 1.1 and 1.2 of Unit B vocabulary words.
2. Be prepared to discuss about mass extinction
and Darwin’s idea of evolution.
Page 33
Page 34
Thursday, October 13, 2011
Friday, October 14, 2011
Geologic Timeline Discussion
Hw - Read Article and Prepare for Socratic Seminar
Warm Up: COPY THIS FOR TONIGHTS HW
1) As you are reading the article, use the following
characters to indicate your thoughts and feelings on the
text. Mark these characters directly on your article.
2) Come up with at least two “big idea” questions that
made you think.
= indicates something you read that you agree with
 = indicates something you read that you disagree with
! = Something that surprises you
? = Something that you were confused about
3) Reflect on your experience to work in learning teams;
Did you choose a good team to work with or did you choose
your friends.
Homework: Read Article and Prepare for Socratic
Seminar
Page 35
Thursday, October 13, 2011
Friday, October 14, 2011
Earth’s History and Mass Extinctions
•Periods when huge numbers of organisms
died or became extinct
1. Permian Extinction
• 90% of organisms died b/c of
climactic changes (Pangaea)
2. Cretaceous Extinction
•Dinosaur extinctions – metorite
hypothesis
Evolutionary Ideas
•Evolution refers to how species change over
time
•Charles Darwin – proposed the most
Infiltration
accepted theories
•Observed charac. of tortoises (neck
lengths) and finches (beak shape) and the
environments they lived in and feeding
A
habits
q
•Asuia result of his observations, he
f
proposed
the idea of Natural Selection
e
(seer the next slide)
Page 36
Darwin’s Ideas of Natural Selection
• Most organisms produce more offspring than can
survive
• Organisms compete with each other for resources
• The ones with favorable traits survive and
reproduce
• Over time, the favorable traits are found more in
the population
• Read more about this at
http://www.independent.co.uk/news/science/moth-study-backs-classictest-case-for-darwins-theory-462938.html
What do you think??
How do you think the
environment affected the
population of finches and
their beak type?
Which peppered moth is likely
to be naturally selected and
survive? Why?
Learning Team Discussion
1) Starting with the 1st half of the Paleozoic Era, explain
your poster to your group in a two minute
presentation. Explain all four life and geologic events
and any additional information you have. You will
each present, but go in chronological order from
oldest Eras to youngest.
– Team members should take notes as they are discussing
each Era, as you may be tested on this info in the future.
2) After all four presentations, discuss with your group
how life and Earth’s geology has changed from the
Paleozoic to the Cenozoic Era.
– Record two main ideas from your discussion in your
notebook.
Monday, October 17, 2011
Tuesday, October 18, 2011
Monday, October 17, 2011
Tuesday, October 18, 2011
Self Assessment, Castle Learning and Start Test Study Guide
Warm Up:
What observations led Darwin to
propose his theory of natural selection?
Socratic Seminar
Evidence of Evolutionary
Darwin was skeptical of his observations
Published book after careful data analysis
Evidences (textbook p. 28B – 34B)
See student notes outline on next slide
Neck Length of
the Galapagos
tortoise.
This affects
survival because…
Future
generations will
look
like….because…..
Homework: Castle Learning and Start Test Study Guide
Page 37
Page 38
Evidences of Evolution (p. 28B – 34B)
Fossil Evidence
• ________________________________________________________
• ________________________________________________________
•
ancestor means ___________________________________________
Similarities In Structures
• Vestigial organs are _________________________________________
• _________________________________________________________
• _________________________________________________________
Similarities in Patterns of Development
• _________________________________________________________
• _________________________________________________________
Genetic Evidence
• ___________________________________________________________
• Genes are ___________________________________________________
• ____________________________________________________________