What is weight?

Weight is how heavy something feels when you hold it or push it around.

Imagine you're holding a basketball and then a soccer ball. The basketball feels heavier because it has more stuff inside it, we call that mass. Weight is like mass, but it depends on where you are. On Earth, your weight is how hard gravity pulls you down. If you went to the Moon, you'd feel lighter because the Moon's gravity isn't as strong.

Think of a shopping bag. When it’s empty, it feels light. But when you put in all your groceries, apples, bread, milk, it becomes heavier. That’s because you added more mass to the bag. The more mass something has, the more weight it has on Earth.

When you're playing on a seesaw with a friend, if one of you is heavier (has more weight), you go down while your friend goes up. That’s because gravity pulls the heavier side down stronger. So weight helps us know how things move and feel, like when you lift something heavy or push a toy car!