CN203300131U - Teaching aid for demonstrating direct solar radiation points and length change of day and night - Google Patents

Abstract

The utility model relates to a teaching aid for demonstrating direct solar radiation points and length change of day and night. The teaching aid is composed of a disc part, a night hemisphere part, a short axis part and a tellurion part, wherein the disc part and the night hemisphere part are located at the same center of circle and connected together through the short axis part. The teaching aid provided by the utility model is easy to fabricate, simple to operate, high in practicability, and also visual and obvious; and certainly, the teaching aid can become a good friend for students to lean and teachers to teach the knowledge about direct solar radiation points and length change of day and night.

Description

The teaching aid that changes for demonstrating subsolar point and day-night length

Technical field:

The utility model relates to teaching aid, especially a kind of teaching aid of demonstrating subsolar point and changing round the clock.

Background technology:

The movement of subsolar point and the variation of day-night length are Focal point and difficult points in the required first volume first module of senior geography " earth in universe ".Because the scope at the variation of day-night length and solar noon sun height in the geographic significance of revolution of earth, polar day polar night, and even move the season of zone of pressure and wind band position, the formation of some important climate types such as savanna climate, etesian climate, all with the position of subsolar point and mobile closely related.In the situation that there is no audiovisual aids, the student sounds and feels abstract hard to understand, is difficult for the teaching efficiency that reaches good.

The utility model content

In order to overcome above difficulty, by practice, specially make a kind of subsolar point of can directly demonstrating and move the teaching aid that changes with day-night length.

For achieving the above object, the utility model provides a kind of and moves the teaching aid with the variation of day-night length be used to demonstrating subsolar point: integrated disc portions, night hemisphere part, minor axis part, globe bracket, partly consist of.Integrated disc portions is representing the sectional view of the earth, and the above is painted with equator, the tropic, polar circle.The additional arrow of vertical 90 degree of night hemisphere part indicates.The night hemisphere part will be enclosed above integrated disc portions, and it is partly connected by minor axis to be in the same center of circle; Integrated disc portions is fixed on the globe bracket part; The night hemisphere part can partly freely be rotated as the center of circle take minor axis.

The utility model is easy, simple to operate, practical, the directly perceived significantly teaching aid of a kind of making, will certainly become the good teacher and helpful friend that vast Students ' Learning and teacher teach these knowledge.

The accompanying drawing explanation

Fig. 1 is night hemisphere part of the present utility model;

Fig. 2 is partly direct-view figure of integrated disc portions of the present utility model and night hemisphere;

Fig. 3 is direct-view figure of the present utility model.

The main element symbol description is as follows:

1, integrated disc portions 2, night hemisphere part

3, minor axis part 4, globe bracket part

Embodiment

For clearer statement the utility model, below the utility model will be further described.

With cardboard, make a disk, be integrated disc portions 1 described in the utility model, equator, the north and south tropic and north and south polar circle on iso-surface patch on it; Make in addition two of the semicircles the same with this disk diameter subsidiary arrow, arrow and semicircle vertical angle, length is radius of a circle, for this reason the described night hemisphere part 2 of utility model; Described night hemisphere part 2 is put in respectively to described integrated disc portions 1 both sides, uses described minor axis part 3 that it is linked together in the center of circle; Again described integrated disc portions 1 and described globe bracket part 4 are installed together.

By this utility model, can very clearly demonstrate subsolar point movement at the earth's surface;on the face of the globe: this utility model is placed on desk, what the arrow of described night hemisphere part 2 partly pointed to is exactly the direction of the sun, and this moment, arrow was exactly the position of subsolar point in the position of described integrated disc portions 1.Because subsolar point is mobile between the tropic of north and south, like this, subsolar point movement law and moving range at the earth's surface;on the face of the globe when just being easy to observe out the earth and revolving around the sun.

Rotate in addition the arrow of described night hemisphere part 2, the size of the described integrated disc portions 1 that described night hemisphere part 2 is shared, just can very clearly show the variation of earth day-night length herein.

Above disclosed be only specific embodiment of the utility model, still, the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.

Claims (3)

1. teaching aid that changes be used to demonstrating subsolar point and day-night length, integrated disc portions, night hemisphere part, minor axis part, globe bracket, partly consist of, it is characterized in that: described integrated disc portions partly is in the same center of circle with described night hemisphere and partly is connected by described minor axis.

2. according to claim 1 be used to demonstrating the teaching aid of subsolar point and day-night length variation, it is characterized in that: described integrated disc portions is fixed on described globe bracket part.

3. according to claim 1 be used to demonstrating the teaching aid of subsolar point and day-night length variation, it is characterized in that: described night hemisphere part is partly freely rotated as the center of circle take described minor axis.

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