Matter is anything that has mass and takes up space. The term refers to all real objects in the natural world, such as marbles, rocks, ice crystals, oxygen gas, water, hair, and cabbage. The term ‘states of matter’ refers to the four physical forms in which matter can occur: solid, liquid, gaseous, and plasma. Our understanding of the nature of matter is based on certain assumptions about the particles of which matter is composed and Continue reading »