A1.1 Water SL Flashcards
What is a medium?
A medium is something in which processes can occur
What are the 8 processes of life?
-Metabolism
-Nutrition
-Growth
-Reproduction
-Movement
-Response to stimuli
-Excretion
-Homeostasis
Where can all the life processes occur?
Water, therefore water is the medium of life
How is a covalent bond formed?
-A covalent bond is formed when two atoms share the same pair of electrons
-Between a water molecule
What is a hydrogen bond?
-A hydrogen bond is the attraction between the - end of a molecule and the + end of another molecule
-Between water molecules
What is cohesion?
Cohesion is water molecules attracting/sticking together
What makes cohesion occur?
Cohesion happens due to hydrogen bonding
What is transpiration?
Transpiration is movement of water through a plant due to evaporation from the stomata
Why does transpiration occur?
Transpiration occurs due to cohesion, water molecules sticking together
Draw how organisms can use cohesion as habitat
….
What is adhesion?
Adhesion is the attraction between water molecules and a solid surface
What is capillary action?
-Capillary action is the result of adhesion
-Capillary action is the movement of water through narrow spaces without external forces
What is a solute, solvent and solution?
-A solute is what is being dissolved
-A solvent is what is doing the dissolving
-A solution is the result of this
Why is water an ideal medium for life in terms of metabolism?
water is a good solvent for metabolism since metabolism requires things to be solutionised, and since water is a good solvent it makes it an ideal medium for life
Why is water a good solvent?
Water is a good solvent because it can only dissolve hydrophilic things such as polar molecule or ions
