8.6C - Behavior of Water

While observing a pond, Nora noticed that water droplets on a leaf seemed to stick together. Which of the following terms BEST explains the strong attraction between these water molecules?

• Adhesion

• Transport

• Cohesion

• Capillary action

Elijah observed that a water droplet appears to roll off of the leaf as opposed to it being soaked in. Which explanation BEST describes why the water droplets stick but are not absorbed by the leaf?

• Cohesion causes the molecules in the leaf to be attracted to the water molecules, while adhesion causes the water molecules to form a droplet.

• Adhesion causes the water molecules to bond strongly with one another, but only weakly with the leaf.

• The cohesive forces between the water molecules are stronger than the adhesive forces between the water molecules and the leaf.

• Cohesion keeps the water molecules attracted to the surface of the leaf rather than the inside of the leaf.

Why does the paperclip stay afloat on the surface of the water?

• The attraction between water molecules on the surface of water creates surface tension.

• The paper clip is more strongly attracted to the air because of surface tension.

• Cohesion occurs between the water molecules and the metal molecules of the paper clip keeping it in place.

• The water molecules on the surface of the water are held together by adhesion.

A plant transports water from the roots, up through the xylem, into the stomates, or pores, of leaves. Which model BEST demonstrates a main process involved in the transport of water in a plant?

• Model A

• Model B

• Model C

• Model D

Which of the following examples BEST demonstrates the processes of adhesion and cohesion working together to transport water?

• Water flowing through xylem in plants

• Water pressure being equal on both sides of a membrane

• Water forming droplets on a surface

• Water repelling objects on its surface

A stalk of celery was placed in a container that was filled with red colored water. Which of the following processes is MOST responsible for the leaves of the celery stalk turning red?

• Surface tension

• Capillary action

• Repulsion

• Equilibrium

Tags

NGSS.MS-PS1-2

A bug walks across the surface of water without sinking into the water. Which explanation describes how cohesion of water molecules keep the surface tension high?

• Water molecules are not strongly attracted to each other.

• Water molecules are strongly attracted to each other.

• Water molecules are strongly attracted to air molecules.

• Water molecules adhere to the air molecules.

The process in which water molecules are strongly attracted to a different type of molecule is called:

• Cohesion

• Adhesion

• Evaporation

• Condensation

The "stickiness" of water, or its ability to form drops is due to which property?

• Adhesion

• Density

• Cohesion

• High heat capacity

What type of bond is primarily responsible for the unique properties of water, including its high specific heat and surface tension?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond