The Story of Photosynthesis

Have you ever wondered how a tiny little seed can grow into a giant, strong tree. Or where the delicious energy in a sweet red apple comes from. It seems like magic, but it’s really me at work. I am like a secret chef for all the plants in the world. I help them take a big drink of water from the ground with their roots, breathe in the special air that you breathe out, and soak up lots of warm, bright sunshine. I mix these things together inside the plant’s green leaves to cook up a sugary meal that helps it grow big and strong. While I’m cooking, I also create a special gift for you and all the animals. My name is Photosynthesis, and I turn sunlight into life.

For a very long, long time, my secret recipe was a big mystery that people wanted to solve. A curious man named Jan van Helmont, way back in the 1600s, tried to figure it out. He planted a small willow tree and for five whole years, he only gave it water. He was so surprised when the tree got super heavy, but the soil it was in weighed almost the same. He thought plants must be made of just water, but he was only partly right. Later, around the year 1774, another clever person named Joseph Priestley did a fun experiment. He put a candle under a glass jar until its flame went out because it used up all the good air. Then, he put a little mint plant under the jar with it. After a few days, he discovered that the plant had made the air fresh again, and he could light the candle. He knew the plant was doing something amazing to the air.

But the biggest part of my secret was still missing. Finally, a man named Jan Ingenhousz figured it out in 1779. He did lots of experiments and realized that I need my most important ingredient to work my magic: sunlight. He saw that plants could only make their sugary food and clean the air when the bright sun was shining on their green leaves. It was like he found the last piece of the puzzle. He learned that I can only cook my special meal during the day. All these smart people helped the world understand my amazing recipe for turning light, air, and water into food.

Because of me, plants can grow and make all the food that you and the animals eat. Every crunchy carrot, sweet strawberry, and leafy piece of lettuce is packed with energy that I helped make. That sugary energy is really just sunshine that has been stored up for you to eat. And remember that special gift I told you about. That gift is oxygen. It’s the fresh, clean air that you need to breathe every single second. It’s the air that helps you run fast, play hard, and live your life. So the next time you see a green leaf or take a deep breath in a park, give a little wave to me. I'm always working, quietly turning sunlight into life, connecting you to the trees, the sun, and the very air you breathe.

Reading Comprehension Questions

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Answer: You are Photosynthesis, the process that helps plants make their own food.

Answer: He was surprised because he only gave it water, but the tree got very heavy while the soil barely lost any weight.

Answer: You give the world oxygen, which is the fresh air that people and animals need to breathe.

Answer: Jan Ingenhousz discovered that plants need sunlight to make food and fresh air.