Properties of water

Water molecules are attracted to each other and stick together because of ______ . This property is ___________ also responsible for which allows water striders, a small insect, to walk on water.

Choose the option that identifies the missing terms, in order of appearance in the sentences.

• surface tension; adhesion

• evaporation; cohesion

• cohesion; surface tension

• adhesion; capillary action

1. 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.

Which statement describes why this happens?

• 1. Weak cohesion between different water molecules causes the water to be pushed along the surface of the towel.

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

• Weak adhesion between different water molecules causes the water to be pushed along the surface of the towel.

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

1. Read the statements and determine if each is an example of adhesion, cohesion, or surface tension.

1. 1. Water strider insect moving across the surface of still water

2. 2. Water droplets forming on a flower’s petals

3. 3. Rainwater falling in droplets

Which option correctly categorizes each statement, in order from 1–3?

• 1. Surface tension, cohesion, adhesion

• Cohesion, adhesion, surface tension,

•  Surface tension, adhesion, cohesion

• Adhesion, surface tension, cohesion

1. 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.

Which statements best explain the properties of water in this scenario? Select all that apply.

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

• Water molecules stick to each other and to the measuring cup due to attraction from adhesion.

• Water molecules stick to each other and to the measuring cup due to surface tension.

• Water molecules stick to each other and form water droplets due to adhesion.

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

Number 1 (a)   Number 2​ (b)   Number 3​ (c)  

• adhesion
• Cohesion
• Surface tension

Tags

NGSS.MS-ESS2-4