How can you easily tell the density of an object compared to other objects?
1. You can drop them in a container of liquid together. The less dense object will float.
2. You can drop them in a container of liquid together. The denser object will float.
3. You can do a scratch test and measure hardness using the Mohs Hardness Scale.
4. You can put the objects on a scale one at time and measure the weight.