Glencoe Science Green Chapter 20

What are physical properties?

• Physical properties are characteristics of matter that can only be measured, not observed.

• Physical properties are characteristics of matter that can be observed or measured without changing the substance's composition.

• Physical properties are characteristics of matter that can be changed without affecting the substance's composition.

• Physical properties are characteristics of matter that can only be observed, not measured.

What are chemical properties?

• The state of matter of a substance.

• Physical properties of a substance.

• The appearance of a substance.

• Characteristics of a substance that describe how it reacts or interacts with other substances.

Give an example of a physical change.

• Boiling water into steam.

• Melting ice into water

• Burning wood into ash.

• Mixing salt and water to form a solution.

Give an example of a chemical change.

• Melting of ice

• Mixing of salt and water

• Burning of wood

• Cutting a piece of paper

What are some examples of physical properties?

• oxidation

• melting and boiling point

• color

• density

What are some characteristics of chemical properties?

• Chemical properties describe how a substance interacts with other substances to form new substances.

• Chemical properties are not affected by temperature or pressure.

• Chemical properties describe the physical appearance of a substance.

• Chemical properties cannot be observed without changing the substance's composition.

What are some signs of a chemical change? (Choose any/all that apply)

• change in color

• release of heat

• release of gas

• odor

What happens to the composition of substances during a physical change?

• changes completely

• remains the same

• partially changes

• becomes unstable

What happens to the composition of substances during a chemical change?

• changes

• only changes temporarily

• changes if the reaction is right

• does not change

Cutting your hair is an example of a ___________ change.

• physical

• chemical