| A | B |
|---|
| citric acid | a white, crystalline solid acid found in citrus fruits |
| transparent | clear; describes something through which you can see an image clearly |
| criteria | a standard for evaluating or testing something |
| crystal | a natural form of a substance. Crystal shape is also a physical property that helps to identify a substance. |
| density | mass per unit volume |
| diatomaceous earth | the skeletal remains of microscopic aquatic organisms (diatoms) |
| dissolve | the process of a substance becoming incorporated uniformly into another |
| engineer | a scientist who designs and builds systems that result in new products or solve problems |
| evaporation | when water in a material dries up or goes into the air or the change of state from liquid to gas |
| extract | a solution of substances dissolved out of organic material |
| filter | a tool used to separate small particles and water |
| gravel | rocks that are smaller than pebbles |
| magnet | an object that sticks to or attracts iron or steel |
| mass | a quantity of matter |
| particle | a very small piece or part |
| powder | a solid material made up of tiny granules |
| property | a characteristic that describes a substance, such as color, size, shape, or texture |
| salt | A white crystalline solid that dissolves in water. Its chemical name is sodium chloride. |
| screen | wire mesh used to separate large and small objects |
| separate | to take apart |
| solubility | the property a substance has of dissolving solvents, such as the solubility of salt in water |
| soluble | capable of being dissolved. Table salt is soluble in water. |
| solute | a substance that dissolves in a solvent to form a solution |
| solution | a mixture formed when one or more substances dissolve in another |
| solvent | a substance in which a solute dissolves to form a solution |
| constraint | a restriction or limitation |
