water properties

Question 1

Waters ability to stick to glass is -

Answer 1

Adhesion

Question 2

Water falls due to gravity because of -

Answer 2

Cohesion

Question 3

This property of water does not allow small objects to break the surface.

Answer 3

Surface Area

Question 4

Surface tension is the property of water in which

Answer 4

Water molecules at the surface tend to stick together

Question 5

Describe cohesion

Answer 5

water molecules attracted to water molecules

Question 6

The movement of water through narrow spaces without the help of gravity is called -

Answer 6

Capillary Action

Question 7

Mary spills a glass of water. When she places a paper towel over the liquid, she notices that the water absorbs and spreads throughout the towel automatically.

Answer 7

Strong adhesion attracts the water to the paper towel and causes the water to move along the surface of the towel.

Question 8

Chet is baking a cake. He pours the water in a measuring cup. He notices that water forms droplets and sticks to the side of the measuring cup.

Answer 8

A. Water molecules stick to each other and form water droplets due to cohesion.

E. The water droplets stick to the sides of the measuring cup due to adhesion.

Question 9

A small needle floats on the surface of water. Soap, which separates water molecules, is added to the water. When soap is added to the water, the needle sinks.
Which statement best explains what causes the small needle to sink?

Answer 9

Soap decreases the surface tension by decreasing the attraction between water molecules.

Question 10

A group of students observe an insect sitting on the surface of water. They discuss how surface tension, cohesion, and adhesion can explain this observation. They disagree on whether surface tension is caused by cohesion or adhesion.

Answer 10

Paolo: “Molecules at the surface have stronger cohesion with the molecules around them, so the surface acts like a thin film. This is why cohesion causes surface tension.”