• Investigation 1:

    property: a characteristic of an object that can be observed such as size, color, shape, and texture

     

    mixture: two or more substances mixed together

     

    separate: to divide or take apart

     

    screen: a mesh-like tool used to separate mixtures by particle size

     

    transparent: clear; describes something through which you can see an image clearly

     

    filter: a fine mesh screen with holes that are so small they cannot be seen with the naked eye

     

    dissolve: the process of a substance becoming incorporated uniformly into another substance

     

    diatomaceous earth (powder): the skeletal remains of microscopic aquatic organisms (diatoms)

     

    solution: a mixture that is formed when one or more substances dissolve into another substance

     

    solute: a substance that dissolves into a solvent to form a solution (solid)

     

    solvent:a substance in which a solute dissolves to form a solution

     

    crystal: a natural form of a material that can often be identified by its properties, such as shape, color, and pattern.

     

    evaporation: the change of state from liquid to a gas

     

    engineer: scientist who designs ways to accomplish a goal or solve a problem

     

    criteria: a rule for evaluating or testing something

     

    constraint: a restriction or limitation

     

    Investigation 2: