A 1.1 Water Flashcards
what is the medium of life?
water
what are the 8 processes of life that happen in water?
Metabolism, Nutrition, Growth, Reproduction, Movement, Response to stimuli, Excretion, and homeostasis
A molecule is..
two or more atoms joined together by one or more covalent bonds
A covalent bond is formed when
two atoms share a pair of electrons
Are water molecules polar or non-polar?
polar
how does a intramolecular bond form in water?
can form between the positive pole of one water molecules and the negative pole of another water molecule
water molecules stick to eachother (cohere) because…
of the hydrogen bonds that form between them
adhesion is..
water sticking to another substance, and this happens if the other substance is hydrophillic
hydrophillic
having an affinity (attraction)for water
hydrophobic
having a low affinity (attraction) for water
how do polar molecules dissolve in water?
they form hydrogen bonds with water
most chemical reactions are catalyzed by enzymes in a aqueous solution because
it allows for both enzyme and substrates to move more freely, and more substrate-active site collisions can occur
physical properties of water (hint 4: B.V.T,S)
Buoyancy- solids float in fluids if their density is higher
Viscosity-resistance to slow of a fluid due to cohesion between the molecules
Thermal Conductivity- the ability of a material to transfer heat
Specific Heat Capacity- the quantity of heat needed to raise the temperature of a gram of material by one degree
life can be found on
planets in the universe that have liquid water (Venus,earth, and mars)
oxidation
a reaction in which hydrogen is removed
intermolecular force
attraction between molecules
intramolecular force
a bond between atoms within a molecule
