A1.1 Water

Question 1

what type of bonds exist within water molecules? why? DRAW IT

Answer 1

polar covalent bonds
this is due to unequal sharing of electrons

Question 2

what type of bonds exist between water molecules? why?

Answer 2

hydrogen bonds
due to Oxygen’s slightly (-) charge and Hydrogen’s slightly (+) charge

Question 3

cohesion

Answer 3

the ability of water molecules to stick to one another through hydrogen bonds

Question 4

adhesion

Answer 4

the ability of water to stick to other polar or charged materials

Question 5

What are the benefits of cohesion?

Answer 5

cohesion allows water to get transorted in plant’s xylem and it’s surface to be used as a habitate

Question 6

How do plants use adhesion?

Answer 6

capillary action in soil and in plant cell walls

Question 7

Solvent properties of water

Answer 7

hydrophilic molecules dissolve in water (e.x.glucose, ions, proteins), most enzymes catalyze reactions in aqueous solutions

Question 8

Buoyancy

Answer 8

an upward force excerted on an object placed in the medium (equal to the weight of the displaced matter) (air<water)

Question 9

Viscosity

Answer 9

the resistance of an object moving through something (air<water)

Question 10

Thermal Conductivity

Answer 10

the ability of a substance to transfer heat (air<water)

Question 11

Specific Heat Capasity

Answer 11

how much heat is needed to heat a substance with 1C for 1 gram

Question 12

How did water come to Earth?

Answer 12

with asteroids

Question 13

An area of, not too strong, not too weak, gravity with, not too hot, not to cold, temperature, where water can allow life.

Answer 13

Goldilock’s Zone