Gravimeter

A gravimeter is a special tool that can help us measure how strong gravity is in a certain place. When you're standing on the ground, you can feel gravity pulling you down towards the center of the earth. But some places have a stronger pull than others!

A gravimeter works kinda like a scale, but instead of measuring your weight, it measures how strongly gravity is pulling on you. We can use this tool to help us learn more about what's going on deep inside the earth.

Scientists might use a gravimeter to see if there are big underground structures, like mountains or canyons, that might be affecting the strength of gravity in a certain place. Or they might use a gravimeter to monitor the earth's movement during an earthquake.

Overall, a gravimeter is a very useful tool that helps us learn more about gravity and the earth's structure.