Question

1. a force that acts on the particles of a liquid at the surface is called
2. how does surface tension force the surface of water to curve?
3. the tendency for water molecules to be attracted and stick to other substances is called
4. 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.

1. what is a curved surface in a graduated cylinder called?

Explanation:

1. Surface tension is the force acting on the surface - particles of a liquid.
2. Surface tension causes the surface of water to curve due to cohesive forces between water molecules.
3. The tendency for water molecules to be attracted and stick to other substances is called adhesion.
4. a. Surface tension helps some insects "skate" across the water surface. b. Surface tension refers to the tightness across the water surface. c. Water molecules attract each other, not repel, due to hydrogen - bonding. d. Surface tension causes raindrops to form round beads. So, the true statements are a, b, d.
5. A curved surface in a graduated cylinder is called a meniscus.

Answer:

1. Surface tension
2. Cohesive forces between water molecules
3. Adhesion
4. a. It helps some insects "skate" across the surface of the water. b. It refers to the tightness across the surface of the water. d. It causes raindrops to form round beads.
5. Meniscus