A piece of wood burns to form ash. C Water evaporates into steam. P A piece of cork is cut in half. P A bicycle chain rusts. C Food is digested in the stomach. C Water is absorbed by a paper towel. P Hydrochloric Acid reacts with zinc. C A piece of an apple rots on the ground. C A tire is inflated with air. P A Plant turns sunlight, CO2, and water into sugar and oxygen. C Sugar dissolves in water. C Eggs turn into an omelet. C Milk sours. C A popsicle melts. P Turning brownie mix into brownies. C

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. Chemical change

Food is digested in the stomach. Chemical change

Water is absorbed by a paper towel. Physical change

Hydrochloric Acid reacts with zinc. Chemical change

A piece of an apple rots on the ground. Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. Chemical change

Milk sours. Chemical change

A popsicle melts. Physical change

Turning brownie mix into brownies. Chemical change

Explanation:

Matter undergoes two types of changes: physical changes and chemical changes.

A physical change is one that affects only the physical properties of a substance such as colour, size, shape, etc., and in which no new substances are formed. Physical changes are easily reversible.

Chemical changes are changes which affect the chemical characteristics and properties of a substance such as reactivity, acidity, basicity, etc., resulting in the formation of new substances.

The following changes below are categorized as either physical or chemical changes based on which of the properties of the substance is affected and whether new substances result or not.

A piece of wood burns to form ash - Chemical change

Water evaporates into steam - Physical change

A piece of cork is cut in half. __ Physical change

A bicycle chain rusts. Chemical change

Food is digested in the stomach. Chemical change

Water is absorbed by a paper towel. Physical change

Hydrochloric Acid reacts with zinc. Chemical change

A piece of an apple rots on the ground. Chemical change

A tire is inflated with air - Physical change

A Plant turns sunlight, CO2, and water into sugar and oxygen. _Chemical change

Sugar dissolves in water - Physical change

Eggs turn into an omelet. _ Chemical change

Milk sours - Chemical change

A popsicle melts. Physical change

Turning brownie mix into brownies - Chemical change

your answer would be a. 12.5 kg