Question

prompt: in a couple of complete 5 to 7 sentence paragraphs, using evidence from physical and chemical properties and changes, compare physical and chemical properties and changes. extend: analysis/third read

Explanation:

Physical properties describe a substance without changing its chemical identity, like color or melting - point. Chemical properties involve a substance's ability to undergo chemical changes, such as flammability. Physical changes don't alter the chemical composition, for example, water freezing. Chemical changes result in new substances, like iron rusting. Evidence for physical properties can be observed directly, while chemical properties are seen during chemical reactions.

Answer:

Physical properties are characteristics of a substance that can be observed or measured without changing the substance's chemical identity. Examples include color, density, and melting point. Chemical properties, on the other hand, describe a substance's ability to undergo chemical reactions and form new substances. For instance, reactivity with oxygen or acids. Physical changes are reversible and do not change the chemical makeup of a substance, like ice melting into water. Chemical changes are irreversible and result in the formation of new substances, such as wood burning to form ash and carbon - dioxide. Evidence for physical properties can be gathered through simple observation and measurement, while evidence for chemical properties is obtained when a chemical reaction occurs.