In atomic theory, new substances are formed when the atoms of other substances are rearranged. in this kind of change, the total number of atoms is conserved. an example of this is shown in the diagram below. there are six atoms both before and after the arrow.

the fossil record provides evidence of a common ancestor to many species.

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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