Density is a measure of how tightly the mass of an object is packed into the space it takes up. It can be calculated by dividing mass by volume. It is a property close propertyA quality, or ...

Scientists have measured the density of liquid iron -- the main component of rocky planet cores -- under conditions similar to Earth's liquid core: 1,000,000 atmospheres and 4,000 degrees Celsius ...

The educationist also showed the students how to make an apparatus to measure density of various liquids with a pen and an eraser.