1. 6.e.2.2
The Earth’s Plates

2. Warm up
Do you think new mountains are being formed on Earth today? How do you know?

3. Volunteers?
Yes, mountains are being slowly formed at plate boundaries across the Earth
Our mission this week is to learn about tectonic plates and their movements which creates volcanoes, earthquakes and mountain building processes across the Earth’s surface

4. Announcements
Science Fair Project PLAN is due TODAY, MONDAY, DEC 16TH!!!
Place in the plastic crate on your way out of class today

5. Announcements
Unit tests have been graded, BUT I still have students who were absent needing to take the test!
Tracking on Wednesday!

6. Announcements
Looking ahead….
Finish Layers of the Earth Unit today
Begin Plate Tectonics Unit today
Quiz (20 questions)on both units Thursday!

7. Announcements
Science Fair BACKGROUND RESEARCH is due FRIDAY, DEC 20TH!!!

8. Can you name the 4 Layers of the Earth?

9. Review of the Earth’s layers

10. Question….
What are the two types of crust found on the Earth?

11. Remember….. Oceanic Crusts: (basalt)
5-10 kilometers thick, found under the oceans, thinner but more dense
Continental Crust: (granite)
35-70 kilometers thick, found under the continents, thicker but less dense

12. Homework Worksheet on Layers of the Earth
Glue, staple, or tape into your notebook and add the entry into your table of contents
I will be checking for this on Thursday during your notebook check!

13. Interactive Notebook Q2
Add entry to Table of Contents
6.E.2.2 Plate Tectonics
Assign the next number

14. Interactive Notebook Q2
Label Next Available Page:
6.E.2.2 Plate Tectonics
Number page to match Table of Contents entry
Circle the number

15. Write in Notebook
The Earth’s crust is divided into 12 major tectonic plates
These plates sit on the dense, hot, layer of the earth known as the lithosphere
Lithosphere = the crust and upper portion of the mantle

16. Write in notebook
The Earth’s plates move about 2 inches per year (5 centimeters)
Convective currents within the mantle cause the plates to move
As they move, the plates:
Press against one another (convergent boundary)
Pull apart from one another (divergent boundary)
Scrape against one another (transform boundary)

17. Plate boundaries……

18. What is convection?

19. Convection currents in the earth

20. Write in notebook
Major geological events occur at these plate boundaries:
Earthquakes
Volcanic Eruptions
Mountain Building

21. Write in notebook New mountain ranges are being formed where
two continental plates press against one another
An oceanic plate and a continental plate press against one another

22. Write in notebook
Thin oceanic plates spread outward at areas known as mid-ocean rift zones.

23. Write in notebook
Scientists who study how wave energy travels through the different layers of the Earth are called Seismologists.

24. Remember…. Waves have characteristics such as:
the number of waves that pass a given point in 1 second
Frequency (speed of the wave)
the height from the rest position to the bottom of the trough or from the rest position to the top of the crest
Amplitude
Distance from crest to crest or trough to trough
Wavelength

25. Transverse waves…..

26. Write in notebook….
During an earthquake, energy is released into the Earth as:
-Primary waves (compression waves)
-Secondary waves (shear waves)
-Surface waves

27. Write in notebook
Primary (P) waves travel through both solid rock (granite mountains) and liquid regions (volcanic magma or water of the oceans) on the Earth
These waves are like sound waves (compression waves)
Travel the fastest

28. Write in notebook Secondary (S) waves only travel through rock
Move twice as slow as P waves
Moves at right angles to the direction of travel (transverse waves)

29. Write in notebook Surface wave
Motion is felt along the ground and Earth’s surface.
Appear like waves or ripples of water that travel across a lake

30. Types of earthquake waves