1. Chemistry Do Now Thursday, 9/28/17
Directions: Take out your Do Now sheet and begin the Do Now on the Earth.
 Compare and contrast the two major types of crust.
What does the prefix lithos- mean?
What is a tectonic plate?
Explain why the faults along the Pacific Plate are called the “Ring of Fire”.
What does the prefix asthenes- mean?
Describe the layer of the Earth called the asthenosphere.
What happens to the pressure and temperature inside of the Earth as you move closer to the core?

2. Chemistry Do Now Thursday, 9/28/17 KEY
Similarities: Both are made of rocky material, both form the outer part of the Earth. Differences: Oceanic crust is denser and made of basalt rocks. Oceanic crust is beneath the world’s oceans. Continental crust is thicker and lighter than oceanic rock. It is made of granite rock and forms the world’s seven continents.
What does the prefix lithos- mean? Rock or stone
What is a tectonic plate? A piece of the lithosphere that is broken into large pieces
Explain why the faults along the Pacific Plate are called the “Ring of Fire”. Along the “Ring of Fire” are lots of volcanoes and earthquakes.
What does the prefix asthenes- mean? Soft or weak
Describe the layer of the Earth called the asthenosphere. The asthenosphere is the upper region of the Earth’s mantle on which the lithospheric tectonic plates slides across. The asthenosphere oozes and moves very slowly almost like melted plastic.
What happens to the pressure and temperature inside of the Earth as you move closer to the core? The closer to the Earth’s core one moves, the greater the Earth’s internal pressure and temperature get.

3. S/O’s & Reminders of Important Dates
Back to School Night was a success! Congrats to Breyawna Simmons, Dauisha Carlton, Nickolas Burney, William Portillo, Elijah Dorsey, Angel Franklin, and Keena’ Henderson for earning a bonus test grade of 100% for coming out to this event!
1st Quarter Progress report grades close on Wednesday, October 4, 2017.
If you are failing a class, you have 6 more days to improve your grade before progress report grades are finalized!

4. Homework
TO BE COLLECTED: Take out last night’s Close Read/DEJ on Plate Tectonics. Put it to the side at your desk.
TONIGHT’S HOMEWORK: Write a 6-8 sentence summary about today’s notes.

5. Objective
Students will know the history of the Earth, plate tectonics and those factors (asteroids, comets, meteorites) that shaped the topography of the planet by performing a close reading, taking notes and answer exit ticket questions.
Mastery Level: 2/3 or better on the Exit Ticket questions

6. New Vocabulary Words Tectonic Plates Crust Mantle Core Lithosphere
Asthenosphere
Outer Core
Mesosphere
Inner Core
Earthquake
Tsunami
Volcano
Volcanic Eruption
Convection Currents

7. Engage Show the students the YouTube video “Plate Tectonics”
Source:

8. Explore
Students will be given the Plate Tectonic Activity where the challenge is to recreate the original supercontinent, Pangaea.

9. Explain
The formation of the Earth

10. How was Earth formed?

11. Nebula hypothesis: Planet formation
Temperature differences with respect to distance from sun
Closer, where temperatures are higher, iron and silicates condense
Farther, cooler, hydrogen, water condense
Material collides and accretes forming planetesimals (small planets)

12. Early Earth
Homogenous
Very hot

13. Segregation of elements: gravitational force
Compositionally distinct layers
Physically distinct layers
Remember: the liquid outer core with the Earth’s rotation produces the magnetic field.

14. Inside the Earth

15. Earth’s Interior
Earth’s interior is divided into layers: the crust, mantle, & core, based on composition. Although the Earth’s crust seem stable, the extreme heat of the Earth’s interior causes changes that slowly reshape the surface.

17. The Crust
Outermost layer of earth made of rock that forms earth’s outer skin
5 to 100 km thick, average thickness is 35 km
thinnest layer
less than 1% of Earth’s mass
Composition of crust: oxygen, silicon, aluminum, calcium, iron, sodium, potassium, magnesium

18. The Crust Oceanic Crust Continental Crust crust beneath the oceans
consist mainly of dense rock (basalt - dark in color)
5-8 km thick
Continental Crust
crust that forms the continents
consist mainly of less dense rock (granite - lighter in color)
30 km average thickness

19. Crust to Mantle
The upper part of the mantle and the crust together form a rigid layer called the lithosphere.
Lithos is greek for stone, 100 km thick
made of pieces called tectonic plates

20. Tectonic Plates
The tectonic plates are pieces of the lithosphere that fit like pieces of a jigsaw puzzle and move on top of the asthenosphere
May Consist of both Continental and Oceanic Crust

21. Major tectonic plates:
Pacific plate North American plate Cocos plate Nazca plate Antarctic Plate
South American Plate Eurasian Plate Indian Plate Australian Plate

22. Crust to Mantle
The asthenosphere is a soft layer of the mantle on which pieces of the lithosphere move
asthenes is Greek for soft or weak
material is like warm tar and can flow slowly
The rigid crust and lithosphere float on the hot, plastic material of the asthenosphere.

23. The Mantle layer of rock between crust and core
2900km thick, 67% of Earth’s mass
Composition - silicon, oxygen, iron and magnesium
physical conditions in mantle change because pressure and temperature increase with depth
temp ranges from 870 ºC to 2,200ºC

24. Convection Currents inside the Mantle
Hot columns of mantle material rise slowly through the asthenosphere

26. The Core Innermost layer of the Earth
6800 km in diameter (3,400 km from outside edge of core to center of core)
1/3 of Earth’s mass, 15% of its volume
Temperature ranges from 2,000 ºC to 5,000ºC
Consist of 2 parts; Inner Core and Outer Core

27. The Outer Core
layer of molten metal (iron and nickel) beneath the mantle
surrounds the inner core
2,200 km thick

28. The Inner Core dense ball of solid metal (iron and nickel)
extreme pressure from layers above
1200 km, from outside edge of inner core to center

29. Earth’s Magnetic Field
Currents in the liquid outer core force the solid inner core to spin
The inner core spins inside the Earth at a slightly faster rate than the rest of the planet
This movement creates the Earth’s magnetic field

30. Earth’s Magnetic Field
The earth acts as a giant bar magnet
Earth’s magnetic fields have reversed more than 177 times in the last 85 million years

31. The End

32. Space Vocabulary
Comet
Asteroid
Meteoroid
Meteor
Meteorite

33. Comet
A comet is a celestial object consisting of a nucleus of ice and dust and, when near the sun, a “tail” of gas and dust particles pointing away from the sun.

34. Asteroid
Asteroids are small, rocky objects that orbit the sun. Although asteroids orbit the sun like planets, they are much smaller than planets.

35. Meteoroid
A meteoroid a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere.

36. Meteor
A meteor is a small body of matter from outer space that enters the earth's atmosphere, becoming incandescent as a result of friction and appearing as a streak of light.

37. Meteorite
A meteorite is a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground. Most meteorites are made of rock, but some contain elements, like, iron and nickel.

38. What if a meteor hit the Earth??? How would it impact the Earth?
Let’s see…
Source:

39. Evaluate Exit ticket questions 1) How did our planet form?
2) Compare and contrast the layers of the Earth based on composition.
3) Compare and contrast the layers of the Earth based on the physical layers.
SKILL MASTERY LEVELS:
 100%: SKILLS EXCEPTIONALLY MASTERED
 67%: SKILLS BASICALLY MASTERED
 <60% : SKILLS NOT MASTERED