Trọng Thủy
Trọng thủy is like a magic power that makes things stick to the ground. Imagine you have a big balloon filled with water. If you hold it in your hand, it's easy to move around because it's light and doesn't have much weight. But if you let go of the balloon, it will fall to the ground because of trọng thủy. Trọng thủy is the force that pulls things down to the ground so they don't float away into space.
But, trọng thủy doesn't just work on balloons filled with water. It works on everything! Even you are affected by trọng thủy! That's why you can't jump super high like on the moon. The moon doesn't have as much trọng thủy as the Earth, so you can jump really high there.
Scientists use trọng thủy to study objects in space too. They can find out how much stuff is in planets and stars by looking at how they affect things with their trọng thủy. So, even though you can't see trọng thủy or feel it directly, it's a very important force that keeps us and everything around us safe and on the ground.
But, trọng thủy doesn't just work on balloons filled with water. It works on everything! Even you are affected by trọng thủy! That's why you can't jump super high like on the moon. The moon doesn't have as much trọng thủy as the Earth, so you can jump really high there.
Scientists use trọng thủy to study objects in space too. They can find out how much stuff is in planets and stars by looking at how they affect things with their trọng thủy. So, even though you can't see trọng thủy or feel it directly, it's a very important force that keeps us and everything around us safe and on the ground.