ClipArt ETC
The phases of the moon.

Moon Phases

The phases of the moon.

This figure shows the orientation of molecules in a substance in a solid state. The molecules are confined to their own spheres of attraction, and their positions are dependent on the positions of the surrounding molecules.

Orientation of Molecules in a Solid

This figure shows the orientation of molecules in a substance in a solid state. The molecules are confined…

This illustration shows a solid state where the orientation is only partial, as in the case of twin crystals. Here, the molecules of each horizontal row have two of their axes parallel with those above and below them, but not the third.

Partial Orientation of Molecules in a Solid

This illustration shows a solid state where the orientation is only partial, as in the case of twin…

This figure represents a solid state where there is no regularity of molecular orientation, as in the case of amorphous substances.

Solid State Showing No Regularity of Molecular Orientation

This figure represents a solid state where there is no regularity of molecular orientation, as in the…

"The various phases of Venus." -Comstock 1850

Phases of Venus

"The various phases of Venus." -Comstock 1850

"...represents two sets of sound waves with like periods and phases but different amplitudes." -Avery 1895

Waves with Different Amplitudes with Equal Periods

"...represents two sets of sound waves with like periods and phases but different amplitudes." -Avery…

"...represents two such wave systems meeting in opposite phases." -Avery 1895

Waves with Opposite Phases

"...represents two such wave systems meeting in opposite phases." -Avery 1895