Question

1. select true or false

• both physical and chemical changes are processes that change matter.
• chemical changes alter the chemical makeup by creating new substances, while physical changes do not.
• physical changes may change the state of the substance.
• chemical changes are often accompanied by smells or changes in color or temperature.

(1 point)

○ true
○ false

Explanation:

• Physical changes involve changes in the state (e.g., solid - liquid - gas) or appearance of a substance without altering its chemical composition. For example, melting ice (solid to liquid) is a physical change.
• Chemical changes result in the formation of new substances. Signs of chemical changes can include the production of a smell (e.g., when food spoils), a change in color (e.g., rusting of iron), or a change in temperature (e.g., an exothermic reaction like burning wood).
• Both physical and chemical changes are processes that change matter. Physical changes change the state or appearance, and chemical changes change the chemical makeup by creating new substances.

Answer:

True