Using a scale, I found that one cup of chopped apples weighed the same as one cup of sliced apples. I conducted this experiment three times with multiple cups of apples and the results were always roughly the same. For years the common assumption was that sliced and chopped fruit would weigh different amounts: in other words, you'd need more cups of chopped fruit than sliced fruit in order to equal the same weight. But when we performed a simple experiment, we found this wasn't always true: in reality, volume and weight are not so closely related. In fact, some people think the opposite is true: they expect chopped fruit to weigh more since it's denser. Here's my interesting finding on cup of water weight.