Biology Water

Question 1

Polar molecules attract other _______.

Answer 1

Polar molecules

Question 2

Do polar and nonpolar molecules mix?

Answer 2

No.

Question 3

Molecule

Answer 3

two or more elements chemically bonded together

Question 4

Chemical Formula

Answer 4

shows the number of elements in a molecule

Question 5

Chemical Bond

Answer 5

an attraction between atoms

Question 6

Covalent Bond

Answer 6

strong bond, holds O and H atoms together in a water molecule.

Question 7

Hydrogen Bond

Answer 7

weak bond, forms between water molecules, constantly break and reform.

Question 8

Polar Molecule

Answer 8

a molecule that has positive and negative charges. Ex: Water

Question 9

Nonpolar Molecule

Answer 9

A molecule that does not have any electrical charge. Ex: Oil and Alcohol.

Question 10

Cohesion

Answer 10

attraction between molecules of the same substance, creates surface tension.

Question 11

Adhesion

Answer 11

attraction between molecules of different substances.

Question 12

Capillary Action

Answer 12

water rises against the force of gravity.

Question 13

Heat Capacity

Answer 13

the amount of energy it takes to raise a substance 1 degree celsius.

Question 14

Does water have a high heat capacity?

Answer 14

Yes. A high heat capacity causes water to change temperatures very slowly.

Question 15

What is the universal solvent?

Answer 15

Water. Able to dissolve compounds and other polar substances.

Question 16

Solution

Answer 16

a mixture in which a solute is uniformly distributed through the solvent.

Question 17

Solvent

Answer 17

able to dissolve other substances

Question 18

Solute

Answer 18

the compound that gets dissolved.

Question 19

Water Density

Answer 19

water is less dense as a solid than a liquid.

Question 20

Does ice float?

Answer 20

Yes

Question 21

Hydrophobic

Answer 21

substances that do not mix well with water. Ex: Oil and Water

Question 22

Hydrophilic

Answer 22

substances that mix well with water. Ex: Salt and Water