Question

multiple choice 1 point
which situation describes a chemical change?
mixing lemonade powder into water
boiling water to make steam
leaves changing color in the fall
ice melting in a glass

Explanation:

A chemical change involves the formation of new substances. When leaves change color in the fall, it is due to chemical reactions (like the breakdown of chlorophyll and the formation of other pigments). Ice melting (physical change - state change), boiling water (physical change - state change), and mixing lemonade powder (physical change - dissolution) do not form new substances.

Answer:

B. Leaves changing color in the fall