Properties of Water

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

• Adhesion

• Cohesion

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.

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.

What two elements make up water?

• helium and oxygen

• hydrogen and oxygen

• helium and carbon

• oxygen and carbon

Tags

NGSS.MS-PS1-1

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

True or false water is a polar molecule? 

• True 
• False 

Tags

NGSS.HS-PS1-3

Which term refers to water having a slightly positive and a slighty negative charge on its ends?

• cohesion

• surface tension

• polar

• adhesion

Tags

NGSS.MS-PS1-1

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

• Adhesion

• Cohesion

Refer to the picture; the insect is not falling through the water because of:

• surface tension

• capillary action

Why is water so good at dissolving so many substances?

• it is polar

• it is less dense as a solid

• cohesion

• adhesion

Tags

NGSS.HS-PS1-2