3.1.7 Water Flashcards
What is the major component of a cell?
Water
How much water is a cell made up of ?
85%
Why has water got unusual properties ?
Because of its diplomat nature and the subsequent hydrogen bonds
What is a water molecule made up of ?
Two hydrogen atoms and one oxygen atom
How do you describe a water molecules slightly positive and negative charger ?
Dipolar
Where are the slight charger in a water molecule ?
Slightly negative oxygen
Slightly positive hydrogen
What are the bonds between different water molecules called ?
Hydrogen bonds
Why has water got a higher boiling point than expected ?
Because the water molecules stick together so it takes more energy to separate them
What does water act as due to its high specific heat capacity ?
It acts as a buffer again sudden temperature variations making an aquatic environment
What does buffering against sudden temperature changes prevent ?
The denature or enzymes
What does the hydrogen bonds between water molecules mean in terms of energy ?
That a lot of energy is required to evaporate 1 gram of water
What is the energy needed called ?
Later heat of vaporisation
What is the tendency of molecules to stick together known as ?
A cohesion
What allows water to be pulled up through a tube ?
It’s large cohesive forces
Give an example of where water is pulled up through a tube
Xylem vessels
