A meaningful exploration composition

I like insects and go outside to observe them whenever I have time. Today, I finished all my homework. Just when I was thinking about going outside to observe the insects, the dark night began to arrival, and God began to "cry"!

I looked at the sky and sighed, thinking: the weather was fine just now. It rained neither early nor late, and it began to rain just before I went out. When I was worried, my mother asked me to drink wolfberry tea. As soon as I saw Lycium barbarum tea, I became interested in it immediately. Because I saw a lot of Lycium barbarum floating on the top of the cup and a few Lycium barbarum at the bottom of the cup, I felt particularly strange. Why do some Chinese wolfberry float on the water and some Chinese wolfberry sink under the teacup? I thought about it carefully: maybe Lycium barbarum is like a ball, and there is air in it that can float on the water.

I started doing small experiments. First, I took out two pieces of Lycium barbarum floating on the water, put one of them in the water and flattened it with a pair of chopsticks. As I expected, Lycium barbarum really bubbled in the water. Then I took off my chopsticks to see if the Lycium barbarum would sink. I saw the Lycium barbarum sink slowly. Then I put a wolfberry on the bottom of the teacup with chopsticks and took off the chopsticks. The wolfberry slowly floated up and finally floated to the water. Well, I finally figured it out. It turns out that my guess is right. Because the air in the first medlar came out, it sank. And there was air in the second medlar, so it floated up.

Through this little experiment, I learned a truth. Lycium barbarum is like a ball. With air in it, it can float on the water, but without air, it will sink.

Once, when I was eating an egg, I suddenly had a brainwave: Can I write on the egg? So, like discovering a new continent, I quickly asked my father, "Dad, can you write in an egg?" "Of course!" Dad said doubtfully. "Can you teach me how to write?" I asked eagerly. ...

I ran to the kitchen excitedly. ...

I first took out an egg, washed it, and then carefully dried it; Then I wrote the word "Song" on the eggshell with a brush dipped in sour vinegar, and then put the egg in the air for a while, because according to my father, I need to wait until the vinegar evaporates. I think it's time, so I put the eggs in the pot-boil them. A minute passed, and I took out my eggs. "Hey, how come it's not cooked yet!" ! How time flies! "Reluctantly, I put it in the pot again. Two or three minutes passed, and I couldn't wait to take out the eggs. " Haha, cooked! "I proudly said to myself. I put the egg in cold water and let it cool. I stared at the egg-the fruit of my labor. Fifty seconds later, I excitedly peeled off the egg and looked at the white and smooth egg body. "Oh, my God! The song I wrote on the eggshell was actually printed on the egg. "I said in surprise. However, this experiment still puzzles me.

Holding this unusual egg, I rushed into the study with doubts and turned on the computer ... It turns out that acetic acid can dissolve a small amount of protein after dissolving the eggshell, and protein has amino acid groups, which will hydrolyze under acidic conditions and appear blue or purple. "So that's it! It really makes me feel overwhelmed! "

From this experiment, I understand: in fact, in our daily life, as long as we observe carefully, we will find many interesting things. If we can put them into action, we can gain more knowledge. Isn't it killing two birds with one stone!

"I'm so happy today. I finished my homework in half an hour. Great!

"I said to myself. What do you do with the rest of your time?

I should go and see the little goldfish my mother bought. I walked quickly to the front of the flat fish tank, and the fish seemed to welcome me and swim to me. Among them, the lion-headed goldfish has a big head and a red and white tail, which seems to show off its beauty. It suddenly occurred to me: Why should fish control their balance in water?

I observed that the fish kept swinging while swimming. Can fins and tails work? In order to verify my guess, I made a bold experiment. I prepared small scissors, fishing nets and gauze first. Then I fished out a grass carp to feed the tortoise with a fishing net. The fish seems to be aware of the danger-struggling desperately. I silently said to the little fish, "Don't be afraid, little fish, just give it once for the success of the experiment!" "

"I stuck the double-sided tape on my thumb and forefinger and stuck the small fish. I picked up the scissors carefully and cut off the fins of the small fish. After cutting, I gently put the bald fish into the fish tank. At first, the little fish struggled for a while and then sank to the bottom of the water. After a long time, it didn't swim again. It seems that my guess is correct.

I was still a little worried, so I looked it up in the encyclopedia. It really said: Fins make fish balance. The fish's tail controls the direction. Through this experiment, I feel how interesting it is to acquire knowledge through observation and experiment!

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I wonder if putting too much water or too little water can make mung beans turn into mung beans quickly? The other day, I did an experiment to test it. I first took two plastic boxes, paper towels and water, and two mung bean seeds. I put paper towels in two boxes first, then 50 drops of water in one box and 80 drops of water in the other box. Then I put two mung bean seeds in two boxes and wrote down the numbers. The one with more water is 1, and the one with less water is No.2. Finally, I put the box on the balcony facing south. Do all this well, my heart is full of sweetness, and I will know the result soon. I also guess that the group with more water will germinate faster. I stood quietly on the balcony, waiting patiently for this moment. I waited for about 2 hours and found that the seeds in box 1 were much bigger, while the seeds in box 2 hardly changed. I waited for about 3 hours and found that the seed skin of 1 box was broken, while the seeds of 2 boxes only rose a lot. I am secretly happy and continue to wait for the moment when the seeds sprout. About three hours later, I looked again and found that 1 had a foot sticking out, while No.2 only had a broken skin. I think: it will take some time to know the result! I waited for two hours. I saw the seeds germinate in the watery box. I let the seeds germinate faster. I cried happily: "I guessed right, I succeeded!" " "ah! This mung bean germination experiment has benefited me a lot!