Okay kiddo, let me try to explain what a gravity anomaly is in a way that is easy for you to understand.
Have you ever played with a ball before? When you throw a ball up into the air, you may have noticed that it always falls back down to the ground. That's because of gravity. Gravity is the invisible force that pulls objects towards each other. So, if you drop something, it falls because the force of gravity is pulling it towards the center of the earth.
Now, not everything on earth weighs the same. There are places on the earth where there are big rocks or mountains. These objects have their own gravity and can pull things towards them. When scientists study the gravity of the earth, they can calculate how much gravity each object on earth has.
But sometimes, when scientists look at the gravity readings of the earth, they notice that there are some areas where the gravity is different than they would expect. These areas are called gravity anomalies. An anomaly is something that is different from what is expected or normal.
So, a gravity anomaly is an area on the earth where the gravity is different than what scientists would expect based on the things that are there. It can be caused by many things, like underground caves, volcanoes, or even something as simple as different rock densities.
But no need to worry - these gravity anomalies don't affect us too much in our everyday lives. We can still stand and walk around without falling over because the strength of gravity is pretty much the same everywhere on earth.
I hope this explanation helps you understand what a gravity anomaly is, kiddo!