Keywords: interesting physics, junior high school, senior one

This article is suitable for: the first grade of junior high school.

Composition source:

This 350-word composition is about Grade One. The topic is "interesting physics experiment". Everyone is welcome to contribute enthusiastically.

In the third class on Friday afternoon, Mr. Jin invited Mr. Tong, Zhe's father, to do an interesting physics experiment for us. Everyone rushed to help Mr. Tong do this and that, and Ren Rudi helped the teacher get a glass of water as a backup. Teacher Jin wrote seven big characters on the blackboard-interesting physics experiment. Teacher Tong pointed to the word physics and said, "Everyone knows physics, which is the subject of our junior and middle schools. Now I'll give you the first little experiment. " So, Teacher Tong took out two sealed glass containers for us.

There is a communicating tube in the middle. As long as you press one of the balls, the red liquid inside will flow into the other ball. Teacher Tong asked the students why. "Maybe it's the heat!" Feng Zhe said that Teacher Tong said, "Yes, that's right. It's about heat. When you go to junior high school, you will understand what this principle is. " Ok, now I'll do the next experiment. Teacher Tong took out a small stick, an iron piece for playing, and an iron piece tied with a rope, so Teacher Tong said, Now, I'm going to do an experiment. I will put a small iron ball on it to play with. Guess, will the iron ball fly out? "Our classmates shouted," No! " "Well, let's do this experiment. "So the teacher hit it, but the iron ball stayed in its original position and did not move. Now everyone has doubts: why is this? Ren Rudi, a knowledgeable person in our class, said, "This is inertia." Teacher Tong said, "Yes, Ren Rudi is right. It's inertia. Everyone will learn it in junior high school. "The next experiment is: Teacher Tong took out an ordinary syringe, filled it with water and sprayed it out. Then, Teacher Tong asked Zhang, a strongman in our class, to pull out the syringe. If Zhang can't pull it out, Mr. Tong will let the weakest one in our class pull it out. Zhang Wenqi is actually easy to pull out.

Why is this? Zhang Wenqi said, "I saw you holding Alina Zhang sweetly and blocking that eye. When I pull it out, you let go. " Teacher Tong said: "Yes, this female classmate observes very carefully, which is the principle of air pressure. Well, this female classmate is very smart, and then we will do the last experiment. " Teacher Tong brought a broken drink bottle and a ping-pong ball. Half of the bottle is full of water. Teacher Tong put the ping-pong ball in the water, and the buoyancy of the water lifted it up. Then, Teacher Tong asked, "Do you think this ping-pong ball will float if I put it in a half-bottle with a mouth and fill it with water?" The student is really smart. Teacher Tong said "no" and did an experiment. It really won't float.

Teacher Tong also asked Su, who has the largest lung capacity in our class, to put the ping-pong ball with half a bottle in the place with eyes for him to blow. Sue was full of anger and blew hard, but it was strange that he didn't blow.

So I asked Liu to come and play, and Liu Zaiqian also played hard, huh? It's strange that it didn't blow up again

So Teacher Tong put it down again and said, "Blow it again to see if it will fall down?" So, Mr. Tong asked Mingming to do the experiment, but it was strange that Mingming couldn't fall down when he played. Teacher Tong said, "You won't understand these truths until you go to junior high school. In fact, you are standing in the distance watching the small waves on the beach. It's nothing. No one in China has won the Nobel Prize yet! Are our classmates confident of winning the Nobel Prize? " "think!" Fifty-two students spoke in unison.

We should study hard and strive for this lofty honor!