The top layer of sedimentary rock is the oldest. true false

False

Explanation:

With a few notable exceptions, sediment at the bottom of a layer was deposited before sediment at the top. Where rock strata (layers) remain in their original horizontal position, the bottom layer had to be deposited before the top layer. Therefore, the top layer is the youngest, and the bottom layer is the oldest.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )