water

Question 1

polarity of aqua

Answer 1

a positive charge on the hydrogen side and negative on the oxygen side

Question 2

water is a polar molecule bc:

Answer 2

1. different charges at each end
2. unequally shared electrons (one atom higher than the other)
   3.open triangular shape
   4.equally shared electrons create a covalent bond (neither of the atoms has a higher density of electrons than the other)

Question 3

due to water polarity—->

Answer 3

hydrogen bonding occurs between water molecules

the hydrogen bond works on the fact that hydrogen has 1 electron

Question 4

structure of water

Answer 4

only water has vacuums (low density)

solid floats in liquid (ice floats in water)

all life is at the bottom of water body (preserves life)

Question 5

whaaat is cohesion of water mollecules

Answer 5

attraction between two water mollecules

water molecules are highly cohesive and able to influence each other (theyre all just a bunch of whores)

Question 6

why does water have surface tension

Answer 6

-ephemeral hydrogen bonding

-the layer of water molecules in water does not have them above (no molecules are pulling upwards, just around and below them)

Question 7

in order for an object ti pass (like through water)

Answer 7

the surface tension must be broken

Question 8

what does water do in plants

Answer 8

—-> in order to bring water to leaves (upwards) the water which evaporates through stoma has cohesion to water in xylem tube

—-> the polarity of water brings the water column towards low-pressure point (in the leaf and xylem tube)

Question 9

water adhesion

Answer 9

force of attraction that sticks two different molecules//substances

I N T R A M O L E C U L A R intramolecular

effect: capillary action and meniscus

Question 10

water cohesion

Answer 10

force of attraction that sticks two of the same molecules/substances

I N T E R M O L E C U L A R intermolecular

effect: capillary action, surface tension, meniscus

Question 11

adhesion between water + other polar substances

Answer 11

> results of polarity
attraction between 2 molecules
keeps water column from dropping

Question 12

the solvent properties of water

Answer 12

the functions of molecules depend on them being HYDROPHOBIC or HYDROPHILIC

Question 13

HYDROPHILIC MOLECULES

Answer 13

> dissolves readily in water

> cytoplasm (containing variety of water (soluble substance) ex: glucose, ions, proteins, amino acids

*> aqueous solution
-water is an excellent medium for transporting dissolved hydrophilic substances
(blood)

Question 14

aqueous solution

Answer 14

water that contains one more more dissolved substance ie blood

Question 15

hydrophobic molecules

Answer 15

> doesn’t dissolve easily in water

> ex: steroids, hormones (testosterone)are able to pass through the plasma membrane and nuclear membrane (can pass through the hydrophobic layers of the cell membrane)

Question 16

proteins that have BOTH hydrophobic + hydrophilic sections can

Answer 16

can stay attached to the membrane (enbend into the hydrophobic layers of the membrane) but still interact with soluble substances in cells fluids (extends into intercellular fluid or cytoplasm)

cuticle (wax to coat leaves) is hydrophobic therefore prevents leaves from dehydrating quickly

Question 17

water buoyancy

Answer 17

the buoyancy force is upwards as there is more pressure from below (water ) than above (air)

Question 18

air buoyancy

Answer 18

literally insignificant

Question 19

water viscosity

Answer 19

far denser

Question 20

air viscosity

Answer 20

less dense

Question 21

water thermal conductivity

Answer 21

high (tresciwe)

Question 22

thermal conductivity air

Answer 22

low (compared to water)

Question 23

specific heat capacity water

Answer 23

can absorbed or give off great deal of heat without changing the temp so mich

Question 24

specific heat capacity air(???)

Answer 24

lowwwww the temp air changes easily