FALCON FOCUS ON YOUR OWN… Search for the 6 differences between the two pictures.

Falcon Focus . Answer the questions on the Falcon Focus sheet you picked up. Label the layers of the Earth based on the picture Describe how density changes as you move further down into the Earth.

Crust Position: Outermost layer Density: Least dense layer of all   Density: Least dense layer of all 2 types of crust: Oceanic: thinner, more dense Continental: less dense

Crust continued… Composition: Solid rock Made mostly of Silicon & Oxygen   Oceanic Crust = Basalt Continental Crust = Granite

Lithosphere  Position: Part of the crust that is on the top of the mantle   Features: Broken into pieces called Tectonic Plates 7th period left off

Asthenosphere Position: Top portion of the Mantle   Position: Top portion of the Mantle Features: Contains Convection Currents

Mantle Position: Middle Layer Features: Thickest Layer   Features: Thickest Layer Density: Density increases with pressure the deeper you go into the Mantle Composition: Hot, softened rock Contains Iron and Magnesium

Outer Core Position: Outer part of the core   Density: Very dense, only less dense than Inner Core Composition: Slow-flowing liquid Mostly Iron and Nickel

Inner Core Position: Deepest layer Density: Most dense layer Composition: A spinning solid Mostly Iron and Nickel

If we can’t reach the Mantle, how do we know what it’s made of?? Scientist track seismic waves (these come from Earthquakes) through the earth’s layers and they examine materials ejected from volcanic activity, which have helped scientists discover what the MANTLE is made of. Most lava that comes from volcanoes is actually just melted crust and is not material from the mantle and/or the core.

So what about the Inner Core and Outer Core?   So what about the Inner Core and Outer Core? Scientists know what the inner and outer core are made of (composition) based on the movement of seismic waves through the layers.

Why is the Inner Core solid?? Even though it is really hot, the weight of all of the other materials above it (crust, mantle, and outer core) put a lot of pressure on the inner core, keeping it solid!   Why does the Earth have a Magnetic Field?? The magnetic field is caused by the movement of the inner (spinning) and outer core (flowing liquid).

3-2-1 Reflection on your notes paper Exit Ticket 3-2-1 Reflection on your notes paper