water

• what bonds holds a single water molecule together

  covalent bonds
• what is meant by a polar molecule


  a molecule with slightly charged regions
• what is meant by dipole


  an uneven distribution of electrons
• what is oxygens charge in a water molecule


  slightly negative
• what is hydrogens charge in a water molecule


  slightly positive
• what happens when two water molecules are close to each other


  their opposing charges attract each other forming a weak hydrogen bond
• what is meant by polarity


  molecules with unequal distribution of chargeleaving one with a greater attraction
• what is meant by cohesion


  a molecules ability to stick together
• what bond holds two water molecules together


  a hydrogen bond
• When are hydrogen bonds the strongest?


  when there are more then three to create a lattice structure
• what structure is formed when two or more water molecules stick together


  a strong lattice
• why is cohesion useful to plants


  it allows water to stick together in a column and move up against gravity in the xylem
• list the properties of water

  surface tension , universal solvent , metabolite , high specific heat capacity ,high latent heat capacity , density and transparency
• describe the surface tension of water


  when water meets air the water molecules form hydrogen bonds with other water molecules ,creating a skin that can support aquatic plants and insects
• describe why water is a universal solvent


  the two different charges on the hydrogen and oxygen atoms will attract the opposite charges and break down molecules
• Why won't lipids dissolve in water

  they dont attract water molecules
• what type of substances are not soluble in water , storage or structural


  structural due to strong bonds
• what are the important properties of water

  allows chemical reactios to take place , can transport soluble molecules
• why is water having a high specific heat capacity important


  this make water require a lot more energy to break the hydrogen bonds to create a more stable living environment for aquatic organisms
• what is the importance of water being less dense in solid state compared to liquid


  it forms an insulating layer that allows aquatic organisms to survive in water underneath the ice and also provide habitats for arctic animals
• why is solid water less dense then liquid water

  each water molecule forms 4 hydrogen bonds and increases the distance berween water molecules
• what is the importance of water being transparent

  it allows underwater plants to photosynthesise
• what is meant by adhesion


  this is when water molecules break down soluble molecules by being slightly charged