transcript
- Slide 1
- Slide 2
- 1.What is the half-life of Carbon? 2. The element chaparralium
has a half-life of 24,000 years. If a fossil contains 25% of the
original amount of chaparralium, how old is this fossil? Show your
work!
- Slide 3
- -Formation -Based on density -Inner Core -Innermost -Thickness
-Temperature -Materials -State -Outer Core -Thickness -Temperature
-Materials -State * Strong magnetic current Layers of the
Earth
- Slide 4
- -Mantle -Thickness -Temperature -Materials -State -3 layers
LAM! -Crust -Thickness -Temperature -Materials -State -Oceanic vs.
Continental
- Slide 5
- 1. Which layer of the Earth do you think is most important and
why? 2. If a fossil has.195% of the original amount of an element,
how many half lives have passed? 3. Which type of dating would you
use to find the age of an ancient basket made of natural fibers?
Why? End
- Slide 6
- Write 3 observations and 1 inference!
- Slide 7
- Identify and label the different continents on your map. North
America South America Africa Europe Asia/India Australia
Antarctica
- Slide 8
- Take 2 minutes to observe the world map. Make 3 observations
about the continents coast lines. Make 1 inference based on your
observation End
- Slide 9
- Take 3 minutes and work with your partner to try and fit the
continent puzzle pieces together. End
- Slide 10
- Do they fit together perfectly? What may have caused the
coastlines to change over time? Come up with 2 possible reasons (2
minutes) End
- Slide 11
- Look at the small pictures on your puzzle pieces. Those are
fossils found in those areas of each continent. Take 2 minutes to
observe the fossil placement. Make 3 observations Make 1 inference
End
- Slide 12
- Rearrange your puzzle so that all of the fossil segments line
up. (2 minutes) End
- Slide 13
- Take 3 minutes to draw in dots along the plate boundaries to
show recent earthquakes. (large dots = more activity, small dots =
less activity) End
- Slide 14
- Take 2 minutes to draw in triangles to show volcanic activity.
End
- Slide 15
- Take 2 minutes to observe the marks you just made on your map.
Make 3 observations Make 1 inference End
- Slide 16
- Alfred Wegner Concept with no mechanism
- Slide 17
- 1. The continents fit together. 2. Fossils of the same animals
are found along the coasts of different continents.
- Slide 18
- Supercontinent 300 million years ago Cycle
- Slide 19
- Scientific theory (concept + mechanism) Lithosphere is broken
up into tectonic plates Moved by convection of asthenosphere Past
plates and current plates How do we know? How many? Farallon
Plate
- Slide 20
- 3. Seismic, volcanic, and geothermal activity along plate
boundaries.
- Slide 21
- Slide 22
- 4. Sea Floor Spreading Mid-ocean ridges Tectonic plates moving
separating New magma rises Form new oceanic crust Older crust
pushed away
- Slide 23
- 5. Magnetic Reversals Molten rock Magnetic minerals Align with
magnetic field Magnetic field reverses 177 times in 85 million
years Last 600,000 years ago Recorded in rock Similar pattern to
age of rocks
- Slide 24
- Convection Asthenosphere Heated rock Expands and rises Cools
More dense
- Slide 25
- 1. Spreading New material pushed up at ridges Pushes older
material away 2. Subduction Denser plate sinks Pulls rest of plate
2 main types of movement
- Slide 26
- Today you learned about all of the evidence supporting plate
tectonics. Using that information make a prediction about what
Earths continents will look like in 100 million years. Make sure to
support your claim with at least three pieces of evidence and
provide commentary for each.
- Slide 27
- Which piece of evidence for continental drift do you think is
most compelling and why? Compelling: strong and forceful, having
influence