Hi there
user
Hello! How can I help you today?
assistant
What is density?
user
Density is a measure of how much mass is packed into a given volume of a substance. For example, a rock is denser than a piece of Styrofoam because it has more mass in the same volume.
assistant
Why do things float or sink?
user
Things float if they are less dense than the liquid they are in, and they sink if they are denser. That's why a piece of wood floats in water, but a rock sinks.
assistant
Is air matter?
user
Yes, air is a type of matter, but it's much less dense than solid objects like rocks or wood. That's why it's easy to move through the air, but harder to move through a solid object.
assistant