Question

1. circle the letter of each sentence that is true about waters surface tension. a. it helps some insects \skate\ across the surface of the water. b. it refers to the tightness across the surface of the water. c. it is caused by polar molecules repelling each other. d. it causes raindrops to form round beads. 10. what is a curved surface in a graduated cylinder called? a. 11. circle the letter of each sentence that is true about capillary action. a. it explains how water moves against the force of gravity. b. it is due to the attraction among molecules of water and surrounding materials. c. it prevents water from moving through materials with pores. d. it causes clothing to stay dry. 12. how does capillary action allow water to climb up the sides of a straw?

Explanation:

1. Surface tension allows some insects to "skate" across the water surface. Option a is correct.
2. Capillary action is the movement of water against gravity in a narrow - tube (like a graduated cylinder). Option a is correct as it describes how water moves against gravity due to the forces involved.
3. Capillary action occurs when water climbs up the sides of a straw due to adhesive and cohesive forces. Option d is correct.

Answer:

1. a. It helps some insects "skate" across the surface of the water.
2. a. It explains how water moves against the force of gravity.
3. d. It causes clothing to stay dry.