"Thermal Motion of Molecular" Heat and Energy PPT Courseware 3

Description

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 3

1. Composition of matter:

*The molecules are very small, about 10-10m in diameter

*Huge number of molecules

Normally, there are about 2.7×1019 molecules in 1cm3 of air. If the speed of counting people could reach 10 billion per second, it would take more than 80 years to count this number.

Think: Are the molecules that make up matter stationary or moving?

2. Diffusion phenomenon:

Phenomenon 1: Gas diffusion

Phenomenon 2: Liquid diffusion

Phenomenon three: solid diffusion

Diffusion phenomenon: The phenomenon of objects in contact with each other entering each other is called diffusion.

The phenomenon of diffusion shows that the molecules of all substances are constantly moving irregularly.

summary:

1. The molecules of all substances are constantly moving irregularly;

2. The movement of molecules is related to temperature. The higher the temperature, the more intense the movement of molecules.

3. Since the motion of molecules is related to temperature, this irregular motion is called thermal motion of molecules.

Basic viewpoints of molecular kinetic theory:

1. Substances are composed of molecules;

2. The molecules that make up matter are constantly moving irregularly;

3. There is a certain gap between molecules;

4. There is both attraction and repulsion between molecules.

1: Fill in the blanks

1. The main physical knowledge involved in "Blooming flowers inside the wall and fragrance outside the wall" is ( ).

2. The diffusion phenomenon can occur between ( ), in ( ), and in ( ).

3. When red ink is dropped into hot water and cold water respectively, it can be found that the hot water changes color faster than the cold water. This shows that the higher the temperature, the thermal motion of a large number of molecules in the water ( ).

2. Multiple choice questions

1. Which of the following phenomena cannot explain that "the molecules of all substances are constantly moving irregularly" ( )

A. Spray some perfume in the room and the whole room will smell the fragrance.

B. In corners where media have been piled up for a long time, the deeper parts of the wall will also turn black.

C. When sweeping the floor in the morning, I often see dust flying indoors under the sunlight.

D. Put a piece of sugar in boiling water and the whole cup of water will become sweeter.

2. The speed of thermal motion of a large number of molecules in an object is related to the following factors ( )

A. The temperature of the object B. The speed of the object

C. The size of the object’s density D. The size of the object’s mechanical energy

Keywords: heat and energy teaching courseware, molecular thermal motion teaching courseware, Shandong Education Edition ninth grade physics PPT courseware download, ninth grade physics slide courseware download, heat and energy PPT courseware download, molecular thermal motion PPT courseware download,. PPT format;

For more information about the "Heat and Energy Thermal Movement of Molecules" PPT courseware, please click the "Heat and Energy ppt Thermal Movement of Molecules ppt" tab.

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 4:

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 4 Do you understand the scale of matter? Light-years: The diameter of the Milky Way is approximately 100,000 light-years. Kilometers: China has a vast territory, about 5,200 km from east to west and 5,500 km from north to south. Meter: Yao Ming’s height is 2.26 m. mm: ..

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 2:

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 2 Substances are composed of molecules. Substances have different _______ when they are in different states. Most substances change volume when they change from liquid to solid. When the state of a substance changes, the volume changes. The changes are mainly due to the composition...

"Thermal Motion of Molecular" Heat and Energy PPT courseware:

"Thermal Motion of Molecular" Heat and Energy PPT Courseware 1. Matter is composed of molecules. If you break the cup, the fragments will still be glass. After being divided many times and even ground into powder, the particles become smaller and smaller. If the points continue to be divided, is there a limit? Keep matter as it is..

File Info

Update Time: 2024-07-06

This template belongs to Physics courseware Lu Jiao Edition Ninth Grade Physics Volume 2 industry PPT template

Preview