Scientists believe that the earth's early atmosphere lacked gas because photosynthetic organisms did not yet exist. a hydrogen b nitrogen c oxygen d sulfur

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

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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