First Prize for Instructional Design on How Sound is Produced

Activity objectives: 1. Cultivate children's interest in exploration and like to use their brains for the questions raised.

2. Explore and discover "how sound is produced" based on your own experience. Try to come up with the theory that sound is produced by the vibration of an object.

3. Children can actively participate in activities, participate in group and peer discussions, and clarify their own opinions.

Preparation for the activity: scientific discovery room, experiment notebook, pen.

Activity suggestions: 1. Teachers ask questions to arouse children's interest in wanting to go.

2. The teacher asks everyone to do the experiment together and record the results of the experiment.

Requirements: 1. Take each group as a unit, and each group has a responsible team leader to record the problems observed by the group members and the results of the discussion.

2. Use the test method to do, listen, think, and find out how sound is produced and what kind of object can be.

Make a sound, and record it.

Summary: Sound is produced by an object by vibrating, and it does not make a sound if it is not touched. After knowing this principle, you can try again which objects can make good sounds, which are also called musical sounds; The sound that comes from something that is harsh is called noise.

Teaching Reflection: Children's understanding of things has the characteristics of image and concreteness, and they like to participate directly in experiments, and are particularly interested in experiential activities. This scientific activity is in line with the psychological characteristics of children who are hands-on and happy.

The purpose of the activity is to cultivate children's interest in hands-on and active activities and their sense of creativity.

1. Teaching Objectives.

Knowledge and skills: Guide students to observe and compare the state of vocal and non-vocal objects, and to think positively about this phenomenon, so as to ** the causes of sounds.

2. Process and methodology.

1. Let students experience all the links in the process of science, create scene problems, conjectures, hypotheses, observe experiments, cooperate and communicate, and train students to master thinking methods, such as observing phenomena, asking questions, speculative results, experimental verification, drawing conclusions, and so on.

2. In the process of hands-on experiments, explore by seeing, touching, and speaking.

3. Emotional attitudes and values: learn to communicate and listen to others, and experience the joy of exploring sounds.

3. Teaching focus and difficulties.

Through activities such as observation, experimentation, comparison, discussion, and communication, we know that "sound is produced by the vibration of an object".

Fourth, the choice of teaching mode.

In order to successfully complete the whole activity, I divided the activity into four parts according to the requirements of the course standards.

1. The content of the activity.

2. Hypotheses are proposed and experimental explorations are carried out.

3. Consolidate and improve, expand and extend.

4. Verify guesses and summarize evaluations. In class, students are asked to observe the characteristics of sound-emitting objects by seeing, touching, and speaking, and to observe and compare the appearance of sound-emitting objects and non-sound-emitting objects, so as to actively think about the observed phenomena.

5. In the teaching of this course, the teaching methods of group cooperation experiments, observation, comparison, discussion and communication are in the scientific research methods that ask questions, and the use of hypothese-experimental investigation to draw conclusions, and strive to enable students to acquire knowledge and improve the ability of the process of investigation.

1.Knowledge and Skills: Guide students to observe and compare the state of sound-emitting objects and non-sounding objects, and to think positively about this phenomenon, ** the causes of sound.

2.Process and Method: Through the creation of scenario questioning, conjecture and hypothesis, observation experiments, cooperation and communication, etc., students can experience all aspects of the scientific process, and train students to master the observation of phenomena and mention.

3.In the process of hands-on experiments, it is carried out by seeing, modeling, drawing, speaking, etc. Emotional attitudes and valuesLearn to communicate and listen to others, and experience the joy of sound.

Sound is a sound wave produced by the vibration of an object. It is a wave phenomenon that propagates through a medium (air or solid, liquid) and can be perceived by the auditory organs of humans or animals. An object that initially emits vibrations (vibrations) is called a sound source.

Sound travels in the form of waves that vibrate (vibrate). Sound is the motion formed by the propagation of sound waves through any medium.

Sound is a wave. Sounds that can be recognized by the human ear (frequencies between 20 Hz and 20000 Hz) are called sounds.

Sound generation and propagation.

Sound is produced by vibrations. When you speak, you cause the air to vibrate, and the vibrations travel out, and as soon as someone's ears receive this vibration, they will hear you. Sound can travel in solids, liquids, or through air or other gases.

As the sound travels, the molecules in the air are squeezed together, then separated, then squeezed, and then separated, and so on, and so on, and sound waves are generated. The sound can be high-pitched.