Water - 3.2 (2)

Question 1

What kind of properties does water have?

Answer 1

cohesive properties

Question 2

Why does water move as one mass?

Answer 2

because the molecules are attraced to each other (because of cohesion)

Question 3

As it moves as one mass because the molecules are attracted to eachother, this is how plants are able to draw what up?

Answer 3

draw water up from their roots and how you are able to drink water through a straw

Question 4

What other properties does water also have?

Answer 4

adhesive properties - this is where water molecules are attracted to other materials

Question 5

For example, when you wash your hands, your hands become wet, and the water doesn’t run straight off. What are the water molecules more strongly cohesive to?

Answer 5

each other than they are to air -> this results in water having a ‘skin’ of surface tension

Question 6

What are the characteristics and properties of water vital in?

Answer 6

sustaining life

Question 7

Because water is a polar molecule, what does it act as?

Answer 7

a solvent in which many of the solutes (substances) in an organism can be dissolved

Question 8

What is the cytosol of prokaryotes and eukaryotes?

Answer 8

mainly water

Question 9

Many solutes (substances) are also what?

Answer 9

polar molecules, amino acids, proteins, and nucleic acids

Question 10

What does water act as?

Answer 10

a medium for chemical reactions

Question 11

What does water help to transport?

Answer 11

dissolved compounds into and out of cells

Question 12

What does water make a very efficient transport medium for?

Answer 12

within living things

Question 13

What does cohesion between water molecules mean?

Answer 13

when water is transported through the body, the molecules will stick together

Question 14

Where does adhesion occur between?

Answer 14

water molecules and other polar molecules and surfaces

Question 15

What does the effects on adhesion and cohesion result in?

Answer 15

water exhibiting capillary action

Question 16

What is capillary action?

Answer 16

the process where water can rise up a narrow tube against the force of gravity

Question 17

What can water also act as?

Answer 17

a coolant

Question 18

What does water acting as a coolant help to buffer?

Answer 18

temperature changes during chemical reactions in prokaryotic and eukaryotic cells bc of the large amounts of energy required to overcome hydrogen bonding

Question 19

Why is maintaining constant temperatures in cellular enviroments important?

Answer 19

as enzymes are often only active in a narrow temperature range

Question 20

What lives in water and cannot survive out of it?

Answer 20

many organisms such as fish

Question 21

How is water stable?

Answer 21

it does not change temperature or become a gas easily, so it provides a constant enviroment

Question 22

Because ice floats, what does it form?

Answer 22

it forms on the surface of ponds and lakes, rather than from the bottom up

Question 23

What does the ice that forms on the surface of ponds and lakes form?

Answer 23

an insulating layer above the water below

Question 24

What would aquatic organisms not be able to survive?

Answer 24

freezing temperatures if their enire habitat froze solid

Question 25

What do some organisms also inhabit?

Answer 25

the surface of water

Question 26

What is surface tension strong enough to support?

Answer 26

small insects such as pond skaters