Which substance combines with iron in the presence of water to form rust?(1 point) carbon dioxide

acid

oxygen

nitrogen

Which process is most likely responsible for the formation of limestone caves?(1 point)

hydrolysis

oxidation

carbonation

abrasion

Which option best describes hydrolysis?(1 point)

oxygen in water combining chemically with substances in rock

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

hydrogen in water combining chemically with substances in rock

water reacting chemically with minerals in rock

Which type of region would be most likely to support chemical weathering?(1 point)

a polar region that is cold and dry all year long

a temperate region with warm summers and cold winters

a tropical region that is hot and humid all year long

a desert region with very little rain

1) Oxygen

2) Carbonation

3) Water reacting chemically with minerals in rock

4) A tropical region that is hot and humid all year long

Explanation:

1) Iron rust is formed when iron comes into contact water where there is oxygen present. The process of iron rusting occurs more quickly in the presence of ions from salt, due to the enabling electrochemical reactions

2) When carbonation of rain water occurs  by the mixing of rain water with atmospheric carbon dioxide, and the solution enters the soil, the weak acid formed dissolve the limestone with the capability to forms caves depending on the location conditions

3) Hydrolysis is a term used to describe a reaction wit water

4) Chemical weathering is the weakening of minerals and rocks by rain water chemicals which will be supported in the hot and humid weather condition that last all year long in the tropics.

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