Which has more mass and volume, a cup of popped popcorn or a cup of cooked rice?

I think it is rice because popcorn can not fit together without crumpling and rice sticks really well together.

Which has more volume: a cup of x or a cup of y? Wouldn't they both have the same volume, since they are both a cup of something?

To determine which has more mass and volume between a cup of popped popcorn and a cup of cooked rice, we need to understand the properties of both materials.

To compare the mass, you can use a kitchen scale. Here's how:

1. Place an empty cup on the kitchen scale and note down its weight.
2. Fill the cup with popped popcorn and measure its weight.
3. Record the weight of the popcorn-filled cup.
4. Empty the cup and repeat the process with the cooked rice.
5. Record the weight of the rice-filled cup.

Now compare the recorded weights of the two cups. The cup that weighs more has more mass.

Determining the volume can be a bit trickier, as it depends on the shape and how the materials are packed. However, since we are using the same-sized cup for both popcorn and rice, we can assume that the volume will be roughly equal. In this case, we are comparing the amount of material that can fit into the cup, not the actual volume of the food itself.

Therefore, based on the measurements, you can conclude whether the cup of popped popcorn or the cup of cooked rice has more mass or volume.