6. how does surface - tension and cohesion impact the movement of water?\n7. what is surface tension?

Brief Explanations:

Surface tension is a property of the surface of a liquid that allows it to resist an external force. Cohesion, the attraction between water - molecules, contributes to surface tension. It causes water molecules at the surface to be pulled inward, creating a 'skin - like' effect. This affects water movement as it can cause water to form droplets or move in certain patterns, like capillary action where water moves up narrow tubes due to the combined effects of adhesion (attraction to the tube surface) and cohesion.

Answer:

Surface tension is the property of a liquid's surface that resists external forces, and cohesion contributes to it, affecting water movement such as in capillary action.