Importance

Question 1

What is the bond that holds water molecules together?

Answer 1

Hydrogen bonds

Question 2

How does the density of water contribute to the survival of organisms?

Answer 2

•The density allows organisms to float
•Water is a similar density to living organisms
•oxygen and nutrients can circulate

Question 3

What does the fact that ice is less dense than water do for organisms?

Answer 3

•Any water that turns to ice floats to the top
•This creates an insulating sheet
•Which protects the organisms bellow

Question 4

What properties of water make it ideal for amphibians?

Answer 4

•Has oxygen dissolved in it
•High specific heat capacity/ temp stability
•High density
•Ice less dense than water

Question 5

does water provide good support? Why/why not?

Answer 5

Yes as it is incompressible

Question 6

How is transport of water in tube like transport cells made more effective?

Answer 6

By the strong cohesion between molecules (as it supports the columns of water)

Question 7

What does cohesion mean?

Answer 7

A property of water molecules that creates an attraction between them which causes them to stick together

Question 8

What’s a result of the strong cohesion in the transport of water?

Answer 8

The surface tension at the water-air boundary is high

Question 9

What is adhesion?

Answer 9

A property of water molecules that creates an attraction between them and surfaces that they are in contact with

Question 10

What are some of the functions of water in the body?

Answer 10

Transport nutrients
Help maintain pH and electrolyte balance
Helps many chemical reactions
Help maintain a normal body temperature