"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 3

Description

"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 3

review:

1. There are two ways to change the internal energy of an object, namely ________ and ________. Their essential difference is: heat transfer is a ________ of energy, and work is a ________ of energy.

2. A heat engine is a machine that converts ___ energy into _____ energy.

3. During the compression stroke of a gasoline engine, _____ energy is converted into ___ energy, and during the power stroke, ____ energy is converted into _____ energy.

in conclusion:

Under certain conditions, various forms of energy can be converted into each other.

Want to discuss

1. What does it mean that the height of the ball gradually decreases?

Answer: It shows that the mechanical energy of the ball gradually decreases.

2. Where does the reduced mechanical energy go?

Answer: The ball rubs against the air and the ground, and part of the mechanical energy is converted into internal energy.

Energy conservation law

Energy will neither be destroyed nor created out of thin air. It will only be converted from one form to other forms, or transferred from one object to another. In the process of transformation and transfer, the total amount of energy remains unchanged. Change.

Method instructions:

According to the law of conservation of energy, when analyzing natural phenomena, if a certain form of energy decreases, another form of energy increase must be found; conversely, when a certain form of energy increases, another form of energy must also be found. Form energy decreases.

1. Multiple choice questions

1. Among the following examples, the conversion of mechanical energy into internal energy is ( )

A. The iron rod is very hot on the fire

B. The car brakes suddenly and the tires heat up

C. Burning wood for heating

D. Energize the electric furnace and the electric furnace generates heat.

2. In the process of various forms of energy conversion, which of the following statements is correct ( )

A. Mechanical energy must be conserved

B. All forms of energy are conserved

C. The total amount of various forms of energy must be conserved

D. Only mechanical energy is converted into internal energy

2. Fill in the blanks

1. When you hit a nail with a hammer, the temperature of the nail increases, and the internal energy of the nail is _____ (fill in "decrease", "unchanged" or "increase"). This is changing its internal energy through the ______ method.

2. Ice cubes slide along the ground and tend to melt gradually. In this process, _____ energy is converted into _____ energy, but the total amount of energy is _______.

3. Judgment questions

1. During the combustion process of coal, the chemical energy of coal is converted into internal energy, but the total amount of energy remains unchanged. ( )

2. When swinging, stop exerting force. The swing will swing lower and lower, and the total amount of energy will become less and less. ( )

What did we learn in this lesson?

Energy neither _______ out of thin air nor ______ out of thin air. It can only _______ from one form to other forms, or from one object to another. In the process of transformation and transfer, The total amount of energy remains ________.

Keywords: Utilization of internal energy teaching courseware, conversion and conservation of energy teaching courseware, NEP version ninth grade physics PPT courseware, ninth grade physics slide courseware download, utilization of internal energy PPT courseware download, conversion of energy And conservation PPT courseware download, .ppt format

For more information about the "Conversion of Energy and Utilization of Conservation of Internal Energy" PPT courseware, please click on the "Conversion of Energy and Utilization of Conservation of Internal Energy" ppt tag.

"Conversion and Conservation of Energy" Heat and Energy PPT Courseware 2:

"Conversion and Conservation of Energy" Heat and Energy PPT Courseware 2 Various forms of energy can be converted into each other. Mechanical energy is converted into internal energy. Mechanical energy is converted into electrical energy. Electric energy is converted into mechanical energy. Children slide on the slide. Due to friction, ____ is converted into ____. Plant growth Enable ___ to transform...

"Conversion and Conservation of Energy" Heat and Energy PPT courseware:

"Conversion and Conservation of Energy" Heat and Energy PPT courseware teaching objectives 1. Know the law of conservation of energy 2. Be able to cite examples of energy conservation in daily life 3. Be able to analyze physical phenomena from the perspective of energy conservation... . .. 1. Various forms of energy For energy,...

"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 5:

"Conversion and Conservation of Energy" Utilization of Internal Energy PPT Courseware 5 Learning Objectives 1. Know the law of conservation of energy. 2. Be able to give examples of energy conservation in daily life. 3. Be able to analyze physical phenomena from the perspective of energy conservation. Self-Study Guide 1 1. Read P27 of the textbook...

File Info

Update Time: 2024-11-22

This template belongs to Physics courseware People's Education Edition Ninth Grade Physics Complete Book industry PPT template

Preview