Surface tension

The video explains how the attractive forces between molecules in a liquid create surface tension, making the surface behave like a thin, elastic skin. This phenomenon allows small objects to be supported on the surface and enables insects to walk on water.

What causes surface tension in liquids?

• The repulsive forces between molecules

• The attractive forces between molecules

• The temperature of the liquid

• The color of the liquid

How does surface tension affect the surface of a liquid?

• It makes the surface change color

• It makes the surface evaporate quickly

• It makes the surface behave like a thin, elastic skin

• It makes the surface hard and brittle

What is one effect of surface tension on small objects?

• It allows them to float

• It changes their color

• It causes them to sink

• It makes them dissolve

Why can small insects walk on water?

• Because they are very light

• Because of surface tension

• Because they have special feet

• Because water is sticky

Which of the following is NOT a result of surface tension?

• Small objects being supported on the surface

• Liquids changing color

• Insects walking on water

• Liquids forming droplets