The process that occurs when physical forces break rock into smaller pieces without changing the rock’s chemical composition is called a. differential weathering b. mechanical weathering c. erosional weathering d. chemical weathering

The process that occurs when physical forces break rock into smaller pieces without changing the rock’s chemical composition is called Physical weathering

Explanation:

Physical weathering is the breaking down of rocks into smaller bits with the use of physical agents

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.