AP Bio Chapter 3 Water

What property of water helps to moderate earth's temperature?

• adhesion

• cohesion

• high specific heat capacity

• hydrogen bonds

Tags

NGSS.MS-PS1-4

What properties of water allows water to travel up the stems of plants in a process called capillary action?

• Adhesion and Cohesion
• Cohesion and Solubility

Tags

NGSS.MS-ESS2-4

A molecule with electrically charged areas is called a _______________.

• magnet
• polar molecule
• electrical molecule

Tags

NGSS.HS-PS1-3

Why does ice stay at the top of oceans instead of sinking to the bottom?

•  Ice is colder than liquid water.
• Ice is less dense than liquid water.
• Ice is more dense than liquid water.

As you add drops to the coins, each drop sticks to the other water because of ________________.

• adhesion

• cohesion

• specific heat

A water molecule is a ________ molecule, which has one oxygen that has a __________ charge and two hydrogens that have a ___________ charge.

• nonpolar, positive, negative
• polar, positive, negative
• polar, negative, positive
• nonpolar, negative, positive

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Water is polar because...

• The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
• The molecule has two poles, at which the it is colder than other regions of the molecule.
• The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
• The water molecule is neutral.

A insect like a water strider can skate along the top of a pond because:

• covalent bonds result in water cohesion

• hydrogen bonds result in water cohesion (surface tension)

• low surface tension of water

Attractions between the negative Oxygen atom of one water molecule and the positive Hydrogen atom of another water molecule are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds

Tags

NGSS.HS-PS2-6