Question

question 4. a florist places a bouquet of white carnations in water containing blue dye. after a time, the flowers turn blue. what process helped the carnations to change color? a. surface tension b. formation of covalent bonds between hydrogen and oxygen molecules c. ability to moderate temperature d. cohesion and adhesion of water molecules

Explanation:

The cohesion and adhesion of water molecules allow water (with the blue - dye) to move up the xylem of the carnations through capillary action, causing the flowers to change color. Surface tension is related to the ability of a liquid surface to resist an external force. Formation of covalent bonds between hydrogen and oxygen molecules is about water molecule structure, not the color - change process here. The ability to moderate temperature is related to water's heat - capacity properties, not the movement of dye in flowers.

Answer:

D. Cohesion and adhesion of water molecules