Do not use gasoline left over from last season, as it may have accumulated water or become chemically changed.

If the fat molecules are changed chemically, then a commercial process would involve a chemical change.

The new technique chemically changes the gene which causes the illness.

The white clay is formed where some granite masses have been changed chemically.

Therefore the substance has not chemically changed, but rather been condensed by the withdraw of water.

The impact chemically changed the material into a form of coesite never seen before.

These are unstable to light, and are chemically changed upon exposure.

This chemically changes the spray to a compound that doesn't have an odor.

No glues stick to it unless someone first chemically changes the surface into a different substance.

Such emissions change chemically and return to earth as acidic rain, snow or particles.