Let’s Review!Let’s Review!

The Nebular HypothesisThe Nebular Hypothesis Several, Alternative, HypothesisSeveral, Alternative, Hypothesis The Structure of our Solar SystemThe Structure of our Solar System And Several of Newton’s LawsAnd Several of Newton’s Laws

Interior Design Interior Design Of The…Of The…

Earth!Earth!

How is the How is the earth’s interior earth’s interior the same as the same as the interior of the interior of an ordinary egg?an ordinary egg?

Let’s find out!Let’s find out!

Before we start…Before we start… Make sure your desk is clear of all Make sure your desk is clear of all

items except your notes and a pencil.items except your notes and a pencil. You will be working in pairs with your You will be working in pairs with your

assigned lab partner. assigned lab partner. Do not use your marker or do anything Do not use your marker or do anything

to the boiled egg I give you until I give to the boiled egg I give you until I give specific instructions of what to do. specific instructions of what to do.

Remember, all labs count as a class Remember, all labs count as a class participation grade. participation grade.

•How many layers do you suppose the earth actually has?

•Do you know some of their names?

Earth’s InteriorEarth’s Interior

Layers of the EarthLayers of the Earth

CrustCrust MantleMantle Outer CoreOuter Core Inner CoreInner Core

5 – 70 km5 – 70 km 2900 km2900 km 2270 km2270 km 1216 km1216 km

The Mantle contains 82 % of the earth’s volume

Remember!Remember!

Earth’s interior layers are hot, Earth’s interior layers are hot, layered, rich in iron.layered, rich in iron.

Sweat from working out

(AKA HOT)

Wearing different kinds of clothes on his person

(AKA LAYERED)

Working out with heavy

metallic objects

(AKA RICH IN IRON)

EARTH

ROCKS!

DefinitionDefinition

• crust - the rigid, rocky outer surface of the Earth, composed mostly of basalt and granite. The crust is even thinner under Earth’s oceans.

Crust + Upper Mantle = Lithosphere

DefinitionDefinition• mantle - a rocky layer located under the crust - it is

composed of silicon, oxygen, magnesium, iron, aluminum, and calcium. Convection (heat) currents carry heat from the hot inner mantle to the cooler outer mantle.

• The upper mantleThe upper mantle - is rigid and is part of the - is rigid and is part of the lithospherelithosphere (together with the crust). (together with the crust).

• The lower mantleThe lower mantle - flows slowly, at a rate of a few - flows slowly, at a rate of a few centimeters per year. centimeters per year.

• The asthenosphereThe asthenosphere - is a part of the upper mantle that - is a part of the upper mantle that exhibits plastic properties. It is located below the exhibits plastic properties. It is located below the lithosphere, between about 100 and 250 kilometers deep. lithosphere, between about 100 and 250 kilometers deep.

• MalleableMalleable – Able to be shaped and bent. ((Think silly – Able to be shaped and bent. ((Think silly putty or playdoh. putty or playdoh.

Upper Mantle + Crust = Lithosphere

Lower Mantle + Outer Core =Asthenosphere

DefinitionsDefinitions

• inner core - the solid iron-nickel center of the Earth that is very hot and under great pressure.

• outer core - the molten iron-nickel layer that surrounds the inner core.

Clear Your Clear Your Desks! Desks!

It’s Time for a Group It’s Time for a Group Quiz!Quiz!

1. What is this layer similar to in an egg?2. How much of the Earth’s volume does this layer hold?3. And 4. What are the names of these layers?Bonus: Name another item, other than an egg, that has

layers like the Earth.

When you have finished the quiz, turn your papers over and place your pencils on top of them.

Also, be respectful and whisper until the last group is finished with their quiz.

HAVE A GREATHAVE A GREATDAY!DAY!