Question

What makes something have a higher or lower density​

Answer 1

Something that has a higher density will have more mass packed into it while something that has a lower density will have less mass.

think of comparing a pebble to a piece of popcorn. the pebble is more dense because it has more mass in the space it takes up than the popcorn.

Answer 2

hollowness : how much empty space there is inside a thing

Step-by-step explanation:

even if something is big it can

fly or float

if there is a lot of empty space inside

which means a plane or boat have lower density