Which substance combines with iron in the presence of water to form rust?

carbon dioxide

acid

nitrogen

oxygen

Bot is correct!

oxygen

carbonation

water reacting chemically with minerals in rock

A tropical region that is hot and humid all year long

Which process is most likely responsible for the formation of limestone caves?

abrasion

carbonation

hydrolysis

oxidation

Which option best describes hydrolysis?

water reacting chemically with minerals in rock

hydrogen in water combining chemically with substances in rock

carbon dioxide reacting with water to form an acid that dissolves minerals in rock

oxygen in water combining chemically with substances in rock

Which type of region would be most likely to support chemical weathering?

a polar region that is cold and dry all year long

a tropical region that is hot and humid all year long

a temperate region with warm summers and cold winters

a desert region with very little rain