A1 Water & Nucleic Acids

Question 1

Cohesion

Answer 1

Force by which molecules of the same type attract and associate.

Question 2

Adhesion

Answer 2

The force by which individual molecules stick to surrounding materials and surfaces.

Question 3

Capillary Action

Answer 3

The tendency of a liquid to move up against gravity when confined within a narrow tube.

Question 4

Surface Tension

Answer 4

Property of the surface of a liquid that allows it to resist an external force, due to the cohesion between water molecules.

Question 5

Buyouncy

Answer 5

The ability of any fluid to provide a vertical upwards force on an object placed in or on it.

Question 6

Thermal Conductivity

Answer 6

The measure of how easily heat flows through a specific type of material.

Question 7

Viscosity

Answer 7

A measure of the fluids resistance to flow.

Question 8

Black-throated loon

Answer 8

Buoyancy
Air:
Loons have large wings to generate lift in less buoyant air.

Viscosity
Water:
Loons are hydrodynamic to reduce drag against viscosity.
Air:
Loons are aerodynamic to reduce drag when flying.

Thermal Conductivity
Water:
Loons have oiled exterior feathers to exclude water.

Specific Heat Capacity
Air:
Loons are insulated by air trapped in down feathers.

Question 9

Hydrophilic

Answer 9

attracted to water

Question 10

Hydrophobic

Answer 10

repelled by water

Question 11

Specific heat capacity

Answer 11

the amount of energy required to raise the temperature of 1 kg of a substance by 1 degree celsius.

Question 12

Ringed seal

Answer 12

Buoyancy
Water: Seals have low density blubber to increase their buoyancy.

Viscosity
Water:
Seals have a streamlined shape to reduce drag against viscosity.

Thermal Conductivity
Water:
Seals have insulating blubber to reduce heat loss.

Specific Heat Capacity
Air:
Seals pups survive in lairs insulated by trapped air.

Question 13

Origin of Water