On Sunday morning, my mother took me to the park to play. The sun shines on my face, and I feel irritable. My clothes are soaked with sweat. I couldn't stand the heat, so I went to the shade with my mother. The dense leaves of the big tree blocked the strong sunlight, and I felt very comfortable at once.

As the summer heat gradually dissipated, I couldn't help looking up at the dense shade, and a question rose in my heart: How did that big tree grow so tall and so big? Does it depend on air and water like humans? After returning home, with this idea, I turned on the computer and checked the relevant information: it turns out that plants grow by photosynthesis. That principle is more complicated. Later, I asked my brother, and finally came to the conclusion that photosynthesis is mainly caused by the magical changes of carbon dioxide and water in plants under the catalysis of sunlight and pigments in chloroplasts, producing oxygen and starch. I finally understand, no wonder plants like sunshine so much, no wonder we want all kinds of trees. It turns out that trees can absorb the carbon dioxide we exhale with the help of the sun and produce oxygen for us to breathe. It seems that Dashu is really our good friend.

In fact, science is everywhere in our lives. As long as you have a pair of eyes that are good at discovering, you will find science so interesting.

A small egg is very powerful

Now, eggs have become a necessity for our daily breakfast.

Today, I still got up lazily and ate my mother's eggs. When I was bored, I picked up an egg to play with, only to find a problem: the egg will not break when pinched vertically!

My curiosity came again, and I looked up the reason online with a full stomach of questions.

It turns out that the shell of an egg is arched. After the egg is subjected to heavy pressure, the stress point evenly distributes the pressure to the surface of the egg. After uniform stress, the stress on the egg surface becomes smaller. So eggs can bear a lot of pressure without breaking. However, once the maximum stress standard is exceeded, the egg will be broken.

I also proved it with practical actions. I put a book on the egg, a few stones on the book, 2, 3, 4 ... Finally, when I put down the seventh one, the egg broke!

Now I understand that eggs are small but powerful. We should carefully observe every subtle thing around us. Don't hesitate, join me and be a "little detective" of life! ! ! ! ! !