Do Now SWBAT identify and explain the layers of the Earth Enter silently Grab materials folders notebooks Begin Do Now Write a hypothesis in an ifthenbecause statement for the following question ID: 675869
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Slide1
Density and Layers of the EarthSlide2
Do Now
SWBAT identify and explain the layers of the Earth
Enter
silentlyGrab materials, folders, notebooksBegin Do NowWrite a hypothesis in an if-then-because statement for the following question:1. If I put a can of Coca Cola and a can of Diet Coca Cola in a bowl of water, which will sink, and which will float? Why? Slide3
Compare Thing 1 and Thing 2
Thing 1
Thing 2
Matter
/
Space
Matter
/
Space
Less dense
More denseSlide4
Apply it to real life:
More sugar
Less sugar
What makes Coke different from diet Coke?Slide5
So what can we conclude about density?
More dense = sink Less dense =
float
This demonstrates Archimedes PrincipleIf the amount of liquid displaced by the object is less than the density of the object, then it will sink Slide6
Liquid Layers
At your desk you have 3 liquids, that you will pour into your clear cup when instructed to.
Water
OilSyrupFirst: make observations about each liquid.THINK-PAIR-SHAREWhich liquid will settle on the bottom? Why?Which liquid will settle on the top? Why?Which liquid will settle in the middle? Why?Slide7
Liquid Layers Think-Write-Pair-Share
What can we claim about each liquid? (which is most dense, least dense, in between)
What
evidence do you have? (data or observations)What is your reasoning? (scientific principle and explanation)Slide8
Layers of the Earth
Make some
observations
about the picture of the structure of the Earth.What can we infer about the layers of the Earth?Slide9
How did the figure out the Earths layers?
Deepest hole on Earth
Kola
Superdeep Borehole12,262 meters (40,230 ft) (1/3 of the crust)Temperature 180 C (356 F) Any further and the drill bit wouldn’t work2. How did scientists figure out there are different layers of the Earth? Scientists can tell by observing the seismic waves that are recorded all over the surface of the earth from distant earthquakes. The seismic waves are reflected (bounced off) off of layers of different density.The seismic waves also
bend because they slow down or speed up when they enter layers of different density. Slide10
Close Read
Based on your reading:
Create a model of the earth’s layers using different colors
Label each layerLabel the relative density of each layerLabel the size of each layer (in Km)Label the composition of each layer (what are they made of?)Write what important process the layer serves (EX. Crust is where all life lives)Slide11
Do Now
SWBAT identify and explain the layers of the Earth
Enter
silentlyGrab materials, folders, notebooksBegin Do NowName the layers of the Earth from least dense to most dense?What two types of plates make up the crust?Slide12
The Earth is like Ogres and onionsSlide13
Close Read
Based on your reading:
Create a model of the earth’s layers using different colors
Label each layerLabel the relative density of each layerLabel the size of each layer (in Km)Label the composition of each layer (what are they made of?) Crust- made of two different types of plates (oceanic and continental, and the mantle is one layer but has two parts that do different things)5. Write what important process the layer serves (EX. Crust is where all life lives)Slide14
Lithosphere and AthenoSphere
1. Lithosphere
T
he rigid outer part of the earth, consisting of the crust and upper mantle.2. AthenosphereThe upper layer of the earth's mantle,below the lithosphere, in which convection is thought to occurSlide15
Science and research simply put
If it looks like a duck
Walks like a duck
Has feathers like a duckQuacks like a duckFlies like a duckEats like a duckHas organs like a duckThen it’s a duck. Slide16
Andrija
Mohorovicic
discovered in 1909 that earthquake waves near the surface moved slower than earthquake waves that passed through the interior of the Earth. He also noticed that the P (primary, first and strongest) waves that passed through the interior of the Earth did not do so in a straight line. These waves were bent or deflected by something.What the scientist knew was that waves of all kinds move faster and straighter through denser, more solid objects.So Mohorovicic came to the conclusion that the outside layer or Crust was made of less dense material (Rock) and the next layer, the Mantle was much denser. This would explain why the earthquake waves moved slower through the crust. So by looking at the seismic waves from earthquakes the scientist learned about the crust and the mantle but they also learned about the outer and inner core. To do this you have to look at a different kind of waves, the S (secondary waves) waves that also get released by an earthquake. These S waves are slower.Beno Gutenberg , a German geologist, believed that the Outer Core must be made of a liquid because the slower S waves could not pass through this layer and in fact "bounced off" and were deflected many degrees off course. In tests, the S waves also bounced off liquids. The fourth layer, the Inner Core, is composed of very, very hot metals (iron and nickel) with pressures so great that the metals do not flow as a liquid, but are forced to vibrate in place like a solid.
Earthquake waves that reach this layer move at the greatest speeds because waves move through solids faster than through gases and liquids. This is how we know that there have to be different layers. Slide17
Exit Ticket
1. What are the layers of the
Earth? Name in order from least dense to most dense
2. What is the inner and outer core made of? 3. What is the lithosphere?