Density is a measure of how much mass is contained within a given volume of a substance. It is commonly expressed as mass per unit volume, such as grams per cubic centimeter.
As temperature increases, the particles within a substance gain more kinetic energy and begin to vibrate faster. This causes them to take up more space, resulting in a lower density. Conversely, as temperature decreases, the particles lose kinetic energy and move closer together, leading to a higher density.
This is because the increased kinetic energy of the particles causes them to spread out and take up more space, leading to a lower density. This effect is most noticeable in gases, as the particles in liquids and solids are already in close proximity to each other.
The motion of particles is directly related to their kinetic energy, which in turn affects the amount of space they take up. When particles move and vibrate faster, they take up more space and have a lower density. When they move and vibrate slower, they take up less space and have a higher density.
No, density can also be affected by other factors such as pressure and composition of the substance. However, temperature is a key factor in determining the density of a substance and it is often used to explain changes in density.