Students, when we are enjoying delicious food; When we are experiencing the wonderful and endless fun that computers bring us; When we eat fresh and sweet watermelon with relish in sunny spring; When we enjoy the coolness brought by the fan, do we think: What has brought such earth-shaking changes to our lives? What brings convenience and happiness to our life? It is science! It is a powerful scientific force that has changed us, changed our lives and changed the whole world!

In the 20th century, when talents came forth in large numbers, some great inventions and discoveries made people's lives change dramatically. Aircraft: a bridge to communicate with the world; Washing machine: liberating the labor force; Microwave oven: the liberator of women; Air conditioning: let the four seasons be like spring; Maglev train: a train that can "fly"; Zipper: seamless; Computers: make people's lives more colorful; Light bulb: illuminate the world; Green food: environmental protection, health and safety; Rice cooker: raw rice becomes cooked rice; Artificial seeds: can solve the food problem of human beings. ...

Technology is everywhere in our life, even in my home, there are endless technologies.

I have a curious heart since I was a child. I always want to find out what I don't understand, or what is novel. I remember once, when I was in "100,000 Why", my father told me about electricity and magnetism: "Electricity can produce magnetism. There is also a short story about this knowledge: 1820, Danish scientist Oster discovered in an experiment that electric energy produces magnetism. Because of this discovery, it opened the door for human beings to use electric energy on a large scale. " Then we did an experiment. My father and I first prepare a compass, a battery and a wire, then straighten the wire, remove the plastic at both ends of the wire to expose the wire, and then connect the wires at both ends of the wire to the positive and negative poles of the battery. Then we put the wire near the small compass. At this time, we observed that when the wire just approached the compass, the compass suddenly turned around and stopped. After cutting off the current, the compass is as quiet as a child who has just been taught. "This is the evidence that electricity can produce magnetism. It's amazing! " I sent a sigh with emotion.

Science and technology are developing rapidly, and life is trying to change. Science and technology are changing our lives. We live in an era of rapid development of science and technology, and we should be proud of it!

Science is a key to innovation, and it can only be opened if it is mastered reasonably.

Let's make life better with unlimited creativity!

extreme

Some people say that society has changed our lives, others say that times have changed our lives, but I want to say that technology has changed our lives.

Students, please think about it. When we watch colorful TV sets, have you ever wondered what has changed our lives so much? When we are walking around the colorful computer kingdom with a mouse, have you ever thought about what changed our lives? Yes, it is technology! It is the great power of science and technology that has changed our lives and changed the world!

Let me talk about information communication first! A long time ago, people's letters had to make the postman travel long distances and go through hardships to reach the recipients. At that time, if you wanted to know the news of your family or friends, it was a long wait. With the rapid development of science and technology, ordinary letters have developed to express delivery, even e-mail, voice letters and video letters. As long as we log on to the Internet, open the e-mail, input the contents of the letter, select the recipient, and then press "Send", it only takes one second for the letter to be sent to the recipient's computer through the Internet. Look, this is the magic of technology, and this is the change that technology has brought to our lives!

In the past, we didn't have a phone or a mobile phone, so we had to rely on others to send messages. Now, every household has a telephone, and everyone has his own mobile phone. As long as there is anything, pick up your mobile phone or phone and dial it gently. If you want to say or do something, you can get it even at the ends of the earth. When you dial the phone, the other person's voice will immediately reach our ears, so that even if there are more thoughts and words, you can talk to the other person enough!

We have all entered the network age now, and there are many things we can do without going out. With the internet, we can listen to music, play games, sing songs and so on on the computer. We can also shop online, buy tickets, remit money and chat with our families, which is not uncommon.

Our life is rich and colorful. We can enjoy all kinds of delicious food, wear all kinds of gorgeous clothes and fly in the blue sky by plane every day ... what is not a great scientific and technological achievement? So I want to say: "It is technology that has changed our lives and changed the world! Students, let us form a good habit of loving and learning science from an early age, establish a scientific spirit, bravely climb the peak of science and build our beautiful home! "

Tisso

In life, science is everywhere. I saw a post on the internet these days. This post is recognized as "very scientific", that is, "dress code" Really scientific? I don't know, either. So, I'll try it today.

Thick down jacket is equivalent to 9℃, thin down jacket is equivalent to 6℃, slightly thick elastic cotton-padded jacket is 5℃, thick sweater is 4℃, cotton vest is 4℃, thick coat is 4℃, thin coat is 3℃, shirt 1℃ and so on. If the temperature is 22℃, just wear short-sleeved T and a thin coat: 22+65438+. This is the content of that post. Now I'm going to start.

The room temperature in my home is now 2 1 degree. The post said that all I have to do is put on a four-degree cotton vest and shirt and keep it at 26 degrees. So I found a cotton vest, a shirt and a plastic bottle. I filled the plastic bottle with clean water, and measured the temperature to be 3.5 degrees. Then I wrapped the plastic bottle tightly with two pieces of clothes for fear that there would be a chill inside.

Finally finished. Wait now. Half an hour later, I couldn't wait to open my clothes and put the thermometer in the water bottle. After a while, I took out the thermometer. I thought that if this bottle of water didn't reach more than 30 degrees, it would at least reach more than 10 degrees, which proved that the dressing rules had certain scientific basis. But the result is not what I thought. At first glance, it was only 4.2 degrees, an increase of 0.7 degrees. Just a little bit, it seems that this dress code is really incredible.

Just then, I heard my mother calling me downstairs and saying that she would go out to exercise. Haha, let's go out to play! I dressed quickly and ran downstairs. Wow! Why is it so cold outside? I'm shaking. I wear a lot, too. Why is it so cold? I have no choice but to go upstairs and put on a small cotton-padded jacket. But I just came downstairs and felt very hot. What's going on here? It's cold without a cotton-padded jacket, but hot with a cotton-padded jacket. What happened?

So I ran upstairs again. This time, I thought of the dress code. Now, I have to believe it again I put on a cotton vest, a thick coat, and a sweater and shirt below. I ran downstairs again. I thought it would be cold or hot this time. Who wants to be neither cold nor hot? It's just right! At this moment, I patted my head, alas! How could I forget the most important thing?

It turns out that we humans have a body temperature, and it will be warmer after putting on clothes. Water has no temperature, so it won't rise when it is wrapped in clothes. How could I forget this? At this time, I suddenly understood a truth: we humans can't say that we are perfect and do things foolproof. Because no one is perfect and foolproof, only by doing something seriously and scientifically can we do it.

In order to avoid unnecessary mistakes, we humans should do things cautiously and scientifically.