| Ice ____ because its density is less than liquid water. |
attract |
| Salt, sand, diamonds, and snowflakes are ____ solids. |
crystalline |
| Salts and sugars dissolve in water and thus are water ____. |
Fahrenheit |
| Blood, muddy water, soil, and granite are ____ mixtures. |
floats |
| All atoms of an element have the ____ number of protons. |
heterogeneous |
| Water freezes at 32° and boils at 212° ____. |
reversed |
| Positive and negative charges ____ each other. |
same |
| Unlike chemical changes, physical changes can be ____. |
soluble |
