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Inside the Earth

Inside the Earth

Assessment

Presentation

Geography

7th Grade

Medium

Created by

7B B

Used 19+ times

FREE Resource

5 Slides • 3 Questions

1

Inside the earth (Part-1)

BY - 7B Manish B

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2

Learning Objective

  • Layers of the Earth


3

Introduction

  • The earth, our homeland is a dynamic planet. It is constantly undergoing changes inside and outside

  • Do you know? The deepest mine in the world is in South Africa. It is about 4 km. deep. In search of oil, engineers have dug a hole about 6 km. deep. 

4

INTERIOR OF THE EARTH

  • the earth is made up of several concentric layers with one inside another

  • The uppermost layer over the earth’s surface is called the crust. It is the thinnest of all the layers. It is about 35 km. on the continental masses and only 5 km. on the ocean floors. The main mineral constituents of the continental mass are silica and alumina. It is thus called sial (si-silica and al-alumina). The oceanic crust mainly consists of silica

  • Just beneath the crust is the mantle which extends up to a depth of 2900 km. below the crust. deep on the ocean floor. Crust Lithosphere core-mantle boundary Mantle Outer core Inner core The innermost layer is the core with a radius of about 3500 km.

5

The Layer of earth

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6

Multiple Choice

just beneath the crust is the _____ is present

1

Crust

2

Mantle

7

Multiple Choice

The uppermost layer over the earth’s surface is called the ______

1

Crust

2

Mantel

3

Core

4

None of these

8

Multiple Choice

the mantle which extends up to a depth of ______

1

3500

2

2900

3

35

4

None of these

Inside the earth (Part-1)

BY - 7B Manish B

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