Earth’s Interior Zones. You have one minute to list everything you know about the Earth.

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Presentation transcript:

Earth’s Interior Zones

You have one minute to list everything you know about the Earth.

The Basics

How much water covers Earth’s Surface?

Liquid water covers 71%of the surface

What gases make up Earth’s atmosphere?

Earth has an atmosphere with mostly Nitrogen and oxygen

What makes Earth different than any other planet in our solar system?

Earth Supports Life

How old is Earth?

Earth is 4.6 billion years old

What shape is the Earth?

Not a sphere; an oblate spheroid (circumference is greater at the equator than at the poles) Average circumference 40,000 km

Have scientists physically explored Earth’s interior?

Scientists have only drilled in the upper 3km of the crust, they have not been to the middle or core

How do scientists know the layers of the Earth?

They have come to this conclusion based on the movement of seismic waves (Earthquakes). Seismic waves move differently through different materials. More on this later!

What are the compositional zones?

3 Compositional zones (As determined by seismic waves) 1.Crust – solid, outermost layer of the Earth; rock (2 types: continental and oceanic) 2.Mantle – 2/3 of Earth’s mass, magma is formed 3.Core – center of the Earth, made of iron and nickel

But 5 structural Zones 1.Lithosphere – crust and upper mantle (tectonic plates) 2.Asthenosphere – plastic part of mantle plates move on 3.Mesosphere – majority of the mantle 4.Outer core – liquid iron core probably the source of Earth’s magnetosphere (North and South Poles) 5.Inner core – solid center of Earth

What is the difference between compositional and structural layers? StructuralCompositional

What is gravity?

The attraction of an object to another object.

What is Isaac Newton’s Law of Gravitation?

Law of gravitation (Isaac Newton) – The force of attraction between two objects depends on the masses and the distance between the objects

What effect does mass have on gravitational force?

The greater the mass of an object, the greater the gravitational pull.

What effect does distance have on gravitational force?

The greater the distance is between the objects, the less the gravitational pull.

What’s the difference between weight and mass?

Weight – the measure of the strength of the pull of gravity on an object. SI unit is the newton (n) Mass – how much matter is in an object An object’s mass will not change from place to place, the weight will.

Summary Summarize each page of notes. Paraphrase your answers to the left side questions. Then, glue to page 22 and 23

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