Weathering that does not alter the chemical composition of the rock is called
a. chemical weathering.
c. biological weathering.
b. physical weathering.
d. acid weathering.

b. physical weathering. Also known as mechanical weathering, this kind of weathering does not alter the chemical composition of rocks. The three types of physical weathering are: frost wedging, thermal expansion and biological weathering.

This bacteria must be very strong as it has a large amount on antibiotic targeting it. this bacteria could be one of many different types and it is very hard to tell which one with out more information.

Ascientist will use that to figure out how or why things are the certain way they are i hope this