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