"Click New Materials" Materials Around Us PPT Courseware 2

Description

"Click New Materials" Materials Around Us PPT Courseware 2

teaching objectives

1. Preliminarily understand some characteristics and applications of nanomaterials, semiconductor materials, superconducting materials, and invisible materials.

2. Experience the process of collecting information through surfing the Internet, going to libraries, conducting social surveys, etc., and understand the impact of the development of new materials on human life and social development.

3. Understand the impact of new materials on human life and social development, realize the significance of science and technology as the primary productive force, and stimulate students' enthusiasm for learning to revitalize China.

1. Nanomaterials

Nano is a unit of length

1nm=10-9m

Nanomaterial scale: 1~100 nanometers

1. Features

When the particles of a material are as small as nanometers, the properties of the material change significantly.

2. Application

Industry, agriculture, energy, environmental protection, medical care, national security, etc.

2. Superconducting materials

1. Features

When the temperature drops to a certain level, the resistance of the material becomes zero, which is called a superconductor.

2. Application

It has great prospects and can save energy and materials if used for power transmission.

3. Shape memory metal

(a) Original shape

(b) Straighten

(c) Recovery after heating

Exercise 2

1. Which of the following statements about superconducting materials is incorrect ( )

A. Superconducting material is a material with zero resistance

B. Very thin superconducting wires can be used to transport powerful currents

C. The resistance of superconducting materials can only be close to zero and cannot be equal to zero.

D. When using superconducting materials to transmit electricity, there is no loss in the transmission circuit.

2. Which of the following statements about nanometers is wrong ( )

A. Nano is a unit of length, and its symbol is nm.

B. People have discovered many new phenomena at the nanoscale, which have brought many new developments to technology.

C. Nanotechnology is the forefront of modern science, and our country’s research in this area has reached the world’s advanced level.

D. All polymer technology products are related to nanotechnology

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"Click New Materials" Materials Around Us PPT Courseware 3:

"Click New Materials" Materials Around Us PPT Courseware 3 1. Nanomaterial Nano is a unit of length 1nm=10-9m Nanomaterial scale: 1 to 100 nanometers 1. Characteristics When the particles of the material are as small as nanometers, the material's Performance will change significantly. ..

"Click New Materials" Materials around us PPT courseware:

"Click New Materials" Materials Around Us PPT Courseware Learning Objectives 1. Understand some characteristics, applications and development prospects of nanomaterials, semiconductor materials, superconducting materials, invisible materials, etc. 2. Understand the impact of new materials on human life and social development The impact of core examination...

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Update Time: 2024-10-19

This template belongs to Physics courseware Guangdong and Shanghai version of eighth grade physics volume one industry PPT template

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