Chemistry 2 Review

A needle floating on water

• Surface Tension

• Cohesion

• Adhesion

Water droplets

• Surface Tension

• Cohesion

• Adhesion

A paper towel absorbing water

• Surface Tension

• Cohesion

• Adhesion

Responsible for water molecules sticking together

• Cohesion

• Adhesion

• Surface Tension

Responsible for water molecules sticking to other surfaces

• Cohesion

• Adhesion

• Surface Tension

The high surface tension of water allows small objects to float on its surface

• Surface Tension

• Cohesion

• Adhesion

Which of the following is responsible for water forming a “dome” shape when it is poured onto a surface?

• Cohesion

• Adhesion

• Surface Tension

Which of the following occurs when a water droplet is placed on a hydrophobic (will not absorb water) surface?

• It spreads out into a thin layer

• It absorbs into the surface

• It forms a meniscus on the surface

• It beads up on the surface

Tags

NGSS.MS-PS2-5

How does cohesion play a role in the high surface tension of water?

• It causes water molecules to stick together

• It causes water molecules to stick to other substances

• It causes water to flow easily

• It causes water to evaporate

Cohesion is the attraction between molecules of different substances.

• True

• False