Some liquids have a higher density than solids. For example, wood is a solid but has a lower density than water, which is why wood generally floats on top of water.

The arrangement, movement and spacing of particles are different in solids, liquids and gases. Find out more with BBC Bitesize. For students between the ages of 11 and 14.

"Scientists create liquid crystals that look a lot like their solid counterparts." ScienceDaily. ScienceDaily, 10 February 2021. <www.sciencedaily.com / releases / 2021 / 02 / 210210133358.htm>.