SOL 6.6 REview

Refer to the picture; the water droplets are sticking to the leaf because of:

• Adhesion

• Cohesion

Refer to the picture; the water is sticking to the spider web because of:

• Adhesion

• Cohesion

Describe ADHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Describe COHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

When water molecules stick easily to other water molecules, this is called what?

• cohesion
• adhesion
• solution
• polar molecule

Tags

NGSS.MS-ESS2-4

Why can water striders walk across the surface of water without falling through?

• They are light enough so they don't break the hydrogen bonds holding the water molecules together

• The insects actually use their wings to hover slightly above the water’s surface

• The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

• The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

Tags

NGSS.MS-PS2-5

Surface tension is caused by ...

• strong cohesion between water molecules
• strong adhesion between the water molecules
• condensation
• water cycle

Surface tension of the water is the cohesive force between water molecule on the surface of water.

• True

• False

The tightness across the surface of water that enables paper clips to float is ____________.

• adhesion
• capillary action
• surface tension
• polarity

Why does ice float?

• As water freezes, it expands and its density decreases.

• As water freezes, it takes up more hydrogen from the atmosphere

• As water freezes, air becomes trapped between the water molecules.

• As water freezes, it takes up more oxygen from the atmosphere