Water Flashcards
1
Q
How do properties of water contribute to the survival of organisms in a habitat?
A
- Ice is less dense than water
- This means the ice floats
- Acts as an insulator for organisms living in the water
- Also provides a habitat for some species
2
Q
How do the properties of water make it suitable as a coolant?
A
- Has a high specific heat capacity and a high latent heat of vaporisation
- Due to the strong hydrogen bonds between the molecules
- Keeps temperature consistent
3
Q
How do the properties of water make it suitable as a habitat for living organisms?
A
- Water buffers temperature
- Provides a stable internal environment - Cohesion between water molecules
- Enables small invertebrates to live on water surface
4
Q
How do the properties of water make it suitable as a solvent?
A
- Polar molecules dissolve readily in water
- Due to water being polar
- Causes attraction to solute molecules
5
Q
How do the properties of water make it suitable as a transport medium?
A
- Cohesion between water molecules
- Forms a continuous column of water in the xylem of plants
6
Q
How strong are hydrogen bonds?
A
- Hydrogen bonds are strong together but weak by themselves
- The more hydrogen bonds the strong it will be
7
Q
How do hydrogen bonds occur between water molecules?
A
- Water is a polar molecule due to uneven distribution of charge
- Bond forms between the delta positive hydrogen atom and the delta negative oxygen atom
8
Q
What is a condensation reaction?
A
JOINS UP two molecules with the formation of a chemical bond and the
LOSS of a water molecule
9
Q
What is a hydrolysis reaction?
A
BREAKS UP the chemical bond between two molecules and the ADDITION of a water molecule
