"Understanding some physical properties of matter" Materials around us PPT courseware

Description

"Understanding some physical properties of matter" Materials around us PPT courseware

teaching objectives

1. Understand the physical properties of materials such as magnetism, electrical conductivity, and thermal conductivity, and be able to describe these physical properties of materials using language and words.

2. Experience the process of exploring the electrical conductivity and thermal conductivity of materials.

3. Learn to understand some physical properties of matter through observation, experiment and comparison.

4. During the process of participating in observations and experiments, students are allowed to feel the diversity of materials in nature, understand the impact of the application of material properties on science and technology, and cultivate students' awareness of using science to serve mankind.

magnetism of matter

Demonstration experiment: a small experiment in which a magnet attracts iron nails.

What did you learn from this experiment? What do you know?

The property of objects that can attract iron, cobalt, nickel and other substances is called magnetism.

What are conductors and insulators? What are the applications?

conductivity of matter

Can you classify the above substances through experiments?

Conductor: an object that easily conducts electricity

For example: copper, aluminum, graphite, human body, earth

copper sulfate solution

Insulator: an object that does not conduct electricity easily

For example: rubber, plastic, wood, ceramics, cotton

pure water

practise

1. "Goujian Sword and Fucha Spear" are composed of alloys such as bronze and tin, mainly utilizing its hardness properties.

2. "Shanghai Jinmao Tower, the third largest building in the world and the largest in China," is a magnificent building. It uses glass, sound insulation panels, and hollow brick building materials. This material has transparent, sound insulation, and heat insulation properties.

3. The water jug ​​is made of ceramics. It is used to hold water and mainly utilizes its thermal insulation properties.

4. The filament is hot up to a thousand degrees and can be used continuously for a long time. The filament is composed of tungsten filament, which mainly utilizes its conductivity and high melting point.

Play games: listen to instructions and hold up signs. Give cards marked with six substances: nickel, copper, silicon, plastic, diamond, and seawater to the six students in the front row.

(1) Who can be attracted by a magnet?

(2) Who is a good conductor of heat?

(3) Who has the greatest hardness?

(4) Who is the conductor?

(5) Who is an insulator?

(6) What are the materials used to make semiconductors?

(7) Who is liquid?

Deepening practice

If you were asked to design an electric hot water cup for heating, what physical properties should the material you choose have?

Operation:

Classwork: Questions 1 and 2 on page p128.

Tutorial (preview):

a. What are the applications of nanomaterials? What are the applications of semiconductor materials?

b. What are the applications of superconducting materials and hidden materials? What other special materials do you know?

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"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...

"Understanding Some Physical Properties of Matter" Materials Around Us PPT Courseware 2:

"Understanding Some Physical Properties of Matter" Materials Around Us PPT Courseware 2 Thinking: What are the material components of each of the above objects? What properties do these substances have? 1. Goujian Sword and Fucha Spear are composed of alloys such as bronze and tin, mainly utilizing its hardness properties. ..

File Info

Update Time: 2024-11-21

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

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