Water

Question 1

Structure of Water molecule

Answer 1

One atom of oxygen bonded to two atoms of hydrogen through polar covalent bonds.

Question 2

Dipole

Answer 2

Uneven distribution of electrons between atoms in a molecule creating a slightly positive and slightly negative region.

Question 3

Hydrogen bonds

Answer 3

The electrostatic force of attraction between a slightly positive hydrogen atom and a slightly negative oxygen atom.
They are the intermolecular forces of water.

Question 4

Polar

Answer 4

Uneven distribution of electrons in a molecule.

Question 5

Electronegativity

Answer 5

A measure of the tendency of an atom to attract a bonding pair of electrons.

Question 6

Hydrophilic

Answer 6

The physical property of molecule that is attracted to water.

Question 7

Hydrophobic

Answer 7

The physical property of molecule that is repelled to water.

Question 8

Cohesion

Answer 8

The property of water that allows it to clump up together to form droplets

Question 9

Adhesion

Answer 9

The property which allows for water to be attracted to other substances and act as an adhesive.

Question 10

Capillary action

Answer 10

Cohesion, Adhesion and surface tension by the hydrogen bonds allow for capillary action in plants.
Action by which the utake of water and its solutes are done against the forces of gravity in a plant.

Question 11

High SHC

Answer 11

Allows for temperature of aquatic environment to remain constant.
Allows for temperature within an organism to remain fairly constant especially within cells for optimum rates of reaction.

Question 12

High Latent Heat of Vaporisation

Answer 12

Lots of energy taken in to break strong covalent bonds.
When sweating, lots of eenrgy used to evaporate the sweat.
This acts as a way to cool.

Question 13

Good Solvent

Answer 13

As water is a polar molecule, it can dissolve charged particles like ions particularly well.
Allows to transport substances, react with substances and be an ecellent medium for reactions to take place.

Question 14

Density

Answer 14

Water is most dense at around 4C. It starts to become less dense as it turns into a solid due to the hydrogen bonds spacing the molecules of water out into a crystal form.
Allows Ice to float

Question 15

Ice floats

Answer 15

Prevents large bodies of water from freezing completely.
Allows for insulation of heat beneath the ice sheet.
Provides habitat for organisms on the ice surface.