Density
Temperature has an effect on density. When the temperature of a substance increases,the density decreases because the atoms are moving all around the place having less mater in one space. When the temperature of a substance of a substance decreases, the density increases because the atoms move slower making the atoms stay in one place. Many substances follow this rule, but there are exceptions. Water is one such exception. When most substances freeze, the substance is more dense. When water freezes, the water molecules are actually farther apart instead of being closer together. This is because the molecules form crystals. The way the water molecules are arranged in an ice crystal makes it less dense than liquid water.