Question

understand the physical and chemical properties of matter
ll-in-the-blank
3 mark the following items with a p if they represent physical properties or changes, or a c
if they represent chemical properties or changes.
— boiling point
— burning wood
— color
— density
— hair lightening
— hardness
— ice melting
— odor
— permanent haircolor
— rusting iron
— solubility
— temporary haircolor
— weight
reaction reactions

Explanation:

• Boiling point: A physical property as it describes a state change without altering the substance's chemical composition.
• Burning wood: A chemical change as it results in new substances (ash, gases) through combustion.
• Color: A physical property as it can be observed without changing the substance's chemical identity.
• Density: A physical property calculated from mass and volume, no chemical change involved.
• Hair lightening: Usually a chemical change as it involves chemical reactions to alter hair pigment.
• Hardness: A physical property related to a material's resistance to deformation.
• Ice melting: A physical change (phase change) from solid to liquid without chemical alteration.
• Odor: A physical property detected by the senses without chemical transformation.
• Permanent haircolor: A chemical change as it bonds color molecules to hair chemically.
• Rusting iron: A chemical change (oxidation) forming iron oxide.
• Solubility: A physical property indicating a substance's ability to dissolve.
• Temporary haircolor: A physical change as it sits on the hair surface without chemical bonding.
• Weight: A physical property related to mass and gravitational force.

Answer:

• boiling point: P
• burning wood: C
• color: P
• density: P
• hair lightening: C
• hardness: P
• ice melting: P
• odor: P
• permanent haircolor: C
• rusting iron: C
• solubility: P
• temporary haircolor: P
• weight: P