JS

The original water sample was translucent yellow with a __heterogeneous__ top layer of oil. Dirt collected at the top and bottom of the bottle rather than a suspension. After the chemical change of the oil being removed from the water, the dirt congregated at the bottom of the sample. The following step was to filtrate the water, after which the sample was a yellow, cloudy, and homogeneous solution, no longer dense. The charcoal absorption gave the water the __physical change__ of appearing clear and clean. The first step was oil-water separation. We took out the oil that was at the top of the water sample. The second step was sand-filteration. The __filtrate__ turned clear after the black and yellow __suspensions__ were taken out. The gravel and sand step took out the black particles. We lost a good amount of water and oil.


 * Chemical Property**- A property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance changed.


 * Physical Property**- Any property used to characterize matter and energy and their interactions


 * Homogeneous**-Corresponding in structure because of a common origin.


 * Heterogeneous**- Having its source or origin outside the organism; having foreign origin.


 * Suspension**- The state in which the particles of a substance are mixed with a fluid but are un-dissolved.


 * Solution**- The process by which a gas, liquid, or solid is dispersed homogenously in a gas, liquid, or solid without chemical change.


 * Density**- Mass per unit volume.


 * Filtrate**- Liquid that has been passed through a filter.


 * Atom**- The component as the source of nuclear energy.


 * Element**- One of a class of substances that cannot be separated into simpler substances by chemical means.


 * Molecule**- The smallest physical unit of an element or compound, consisting of one or more like atoms in an element and two or more different atoms in a compound.


 * Compound**- A pure substance composed of two or more elements whose composition is constant.


 * Physical Change**- A usually reversible change in the physical properties of a substance, as size or shape.


 * Chemical Change**- A usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least on new substance.