Help me find the answers please I’m timed!

The chemical and physical processes that change objects on Earth's surface over time are called weathering .  Over thousands of years, weathering breaks up rocks into smaller pieces.

b. Mechanical weathering,Chemical makeup,Surface area,clay,ice wedging expands, abrasion

   there all in order btw

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

i think it would be 5