"Finding Arches" Shape and Structure PPT Courseware 4

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"Finding Arches" Shape and Structure PPT Courseware 4

What are the characteristics of an arched structure carrying gravity?

When the arch is subjected to vertical pressure, it must generate horizontal thrust to both sides at the same time, and transmit the force downward and outward to the adjacent parts.

Observe the cut-open table tennis shell, take a look and pinch it. How is its thickness, softness and hardness?

The spherical shell itself is not thick, very thin, and soft

Try it, how much pressure can three such table tennis shells buckle on the table bear?

It can hold heavy books and carry heavy loads. The table tennis shell is dome-shaped, which can be regarded as a combination of arches. It bears a lot of pressure; it has no outward thrust when it is under pressure.

If you squeeze and press a complete table tennis ball hard with your hands, will it easily become deflated?

It feels very hard and the ping pong ball doesn’t move at all.

What scientific principles are contained in the shape design of plastic bottles?

1. The cylindrical shape is evenly pressurized without deformation;

2. Cylindrical shape saves material.

3. The geometric shape can reduce the space between bottles, making it safe and space-saving during transportation.

4. The pattern of the bottle plays an anti-slip role.

3. Understand the arch structure in living organisms

People have created many artificial objects using the characteristics of arch, dome, sphere, and arc. In nature, are there any natural arches?

Do we have arches in ourselves?

Do you understand the structure and function of living organisms?

Read the third part of the text.

How much force can an egg withstand and what is the significance of its shape?

When the egg is evenly stressed, it can withstand a force of 34.1 kilograms! The egg's great endurance is inseparable from its unique egg-shaped curve and scientific structure. The wonderful egg shows us the masterpiece of nature that uses the least materials to create the largest space and withstands great force. An egg is 4 centimeters long, and the eggshell is only 0.38 millimeters thick. The ratio of thickness to length is 1:130, which shapes its shape with its unique egg-shaped curve. A structure with a curved shape and very thin thickness that mainly bears pressure is called a thin shell structure in architecture.

arch structure on car

There are many arched structures on cars. For example, the roofs of many cars use arched structures, which can improve the strength of the car body and withstand impact when it is hit, and can also keep the car body from deforming. At the same time, the arched structure of the car roof increases the beauty of the car body, increases the height of the interior space, and enhances comfort.

judge

1. The spherical shape is arched in all directions, which makes it stronger than any other shape. ( )

2. Tubular onions are both strong and light. ( )

3. The dome-shaped shell mainly makes it more beautiful. ( )

4. The egg is approximately spherical in shape because this makes it stronger. ( )

5. The shape design of plastic beverage bottles is mainly for aesthetics and practicality. ( )

6. The tubular arm bones and leg bones are strong and light. ( )

7. The shape of the ribs is not arched, it is rectangular. ( )

8. The main purpose of making the pot lid into a dome shape is to increase the capacity of the pot. ( )

1. The good pressure-bearing performance of the safety helmet is based on the principle of ( ).

A. Arch B. Dome C. Tower

2. The shape of the National Center for the Performing Arts is similar to ( ).

A. Sector-shaped B. Arch-shaped C. Tower-shaped

3. The items below ( ) do not utilize the arch principle.

A. Dome roof B. Zhaozhou Bridge C. Pyramid

4. Human feet can carry a large amount of weight mainly because ( ).

A. The number of foot bones is large. B. The muscles of the feet are well developed.

C. The foot bones form an arch structure

fill in the blank:

1. The dome shape can be regarded as a combination of _______. It has the characteristics of _______ carrying large pressure, but there is no force to push _______ when the arch is under pressure.

2. The body parts of many creatures have arched structures. For example, the _______, _______ and other parts of the human body are protected by arches.

3. The shape of the entire table tennis ball is called _______. This shape can be regarded as an arched _______.

Please explain the characteristics of a spherical object when it is subjected to pressure.

Answer: The dome shape can be seen as a combination of arches. It has the advantage of an arch that can withstand a lot of pressure, but it does not have the force to push outward when the arch is under pressure. If any part of the sphere receives force, the force can be evenly distributed around it, so the sphere is stronger than any other shape.

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"Looking for Arches" Shape and Structure PPT download:

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"Looking for Arches" Shape and Structure PPT:

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Update Time: 2024-06-30

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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