"Globe" PPT

Description

Hunan Education Edition fifth grade science volume 1, globe PPT

Part One Contents: Globe

A globe actually?

A globe is a scaled-down version of the Earth based on the shape of the Earth. It is a model of the Earth and can also reflect the movement characteristics of the Earth.

Activity 1:

2. Basic elements on the globe

Activity 2:

How to identify direction on a globe

(1) On the globe, what direction is along the rotation of the earth?

(2) On the globe, what direction is towards the North Pole? Which direction is towards Antarctica?

(3) When a person faces the North Pole, what are his front, back, left, and right directions?

Globe PPT, Part 2: Model of the Earth

1. Model of the Earth—Globe

1. Use the right hand to indicate the direction of the Earth's rotation:

The thumb represents the North Pole, and the direction in which the four fingers are bent represents the direction of the Earth's rotation.

2. Identify directions on a globe:

What rotates along the Earth's axis is the east

What rotates against the Earth's rotation is the west

Toward the North Pole is North

Toward the South Pole is South

Globe PPT, Part 3: Meridians

What is a meridian?

On the earth's surface, the lines connecting the north and south poles are called longitudes, also called meridians.

What is the prime meridian?

Internationally, the meridian passing through the former site of the Greenwich Observatory in the United Kingdom is called the prime meridian.

think about it

(1) Where do the longitude lines intersect?

(2) Are the lengths of the longitude lines equal?

(3) Is the meridian a semicircle or a full circle?

(4) What direction does the longitude indicate?

(5) How many longitudes are there on the globe and how are they distributed?

Division of East and West Meridians:

East longitude (E): 180° eastward from 0° longitude

West longitude (W): 180° westward from 0° longitude

The east and west longitudes coincide at 180°

Division of north and south latitudes:

0° latitude: Equator

North latitude (N): latitude north of the equator (0-90°)

North Pole: 90° north latitude

South latitude (S): Latitude south of the equator (0-90°)

Antarctica: 90° south latitude

Globe PPT, Part 4: Practice

practise:

1. Beijing’s latitude is 40° north latitude and its longitude is 116° east longitude, so it is located in the ___ (fill in “east” or “west”) hemisphere and ___ (fill in “south” or “north”) hemisphere

2. Sydney’s latitude is 34° south latitude and its longitude is 151° east longitude, then it is located in the ___ (fill in “east” or “west”) hemisphere and ___ (fill in “south” or “north”) hemisphere

3. Brasilia’s latitude is 16.5° south latitude and its longitude is 48.5° west longitude, then it is located in the ___ (fill in “east” or “west”) hemisphere and ___ (fill in “south” or “north”) hemisphere

Globe PPT, Part 5: Summary

summary:

1. Division of Eastern and Western Hemispheres:

Boundary lines: 20° west longitude and 160° east longitude.

Eastern Hemisphere: 20° west longitude → 160° east longitude

Western Hemisphere: 20° west longitude → 160° east longitude

2. Division of Northern and Southern Hemispheres:

Boundary: 0° latitude, the equator

Northern Hemisphere: 0° - 90° north latitude

Southern Hemisphere: 0° - 90° south latitude

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Update Time: 2024-11-24

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