science revision
Physics
Biology
Chemistry
energy stores
mitosis
history of periodic table
energy tranfers
Osmosis
diffusion
groups of periodic table
magnetic, thermal, elastic potential, gravitational potential, kinetic, chemical, nuclear, electrostatic.
Websites
The spreading and movement of particles, from a high concentration to a low concentration gradient. Gases or liquids.
mechanical, electrical, heating, radiation
the net movement of water molecules from an area of high water concentration to an area of low wotah concentration through a semipermeable membrane passively
group 1
group 7
transition metals
group 0
nobel gases: they are inert they are unreavtive and have a full outer shell of electrons
Active transport
Within the human body
Within plants
Villi and lungs
alkali metals: they are highly reactive and have one electron in their outer shell very soft metals and get more reactive as you go down the group
halogens: highly reactive and have on less than full electrons in their outer shell and get less reactive as you go down the group
The villi and lungs are adapted for active transport, they are long and thin to increase their surface area. They then have one-cell thick membranes to keep them on the scale of solvents. Finally, they maintain a steep concentration gradient.
maluable strong ductile less reactive good conductors and solid (except mercury)
the movement of particles from an area of low concentration to an area of high concentration using energy
ZEKE- says
efficiency equation
osmosis
active transport
gasses
the rates of diffusion are effected by surface area tempeture and concentraton gradient
For plants to take up and absorb mineral ions, plant ions are moved into the root hairs within the plant. These then create a higher concentration within the plant than the dissolved solvents in the soil. Active transport then occurs due to the plant maintaining a steep concentration gradient, and the ions are absorbed.
the net movement of water molecules from an area of high water concentration to an area of low wotah concentration through a semipermeable membrane passively
Energy efficiency (%) = useful energy output(j) / total energy input(j) x 100
power
Power (w) = work(j) / time (s)
Power (watts) = Current(amphs) x Potential Difference (volts)
the movement of particles from an area of low concentration to an area of high concentration using energy
Requires energy!!
Equations
elastic potential energy
Ee = ½ x K x E2
specific heat capacity
Change in energy (j)= mass(kg) x specific heat capacity x temp change
power
Power (w) = work(j) / time (s)
Power (watts) = Current(amphs) x Potential Difference (volts)
kinetic energy
Ek = ½ x M x V2
Ek = kinetic energy
M = mass (kg)
V = velocity (m/s)
Ee joules elastic potential energy
K spring constant n/m
Extension meters
gravitanional potential energy
Ep = M x G x H
[E]nergy in joules
[M]ass in kg
[G]ravitational field strength 10N/kg
[H]eight in meters
hypertonic
hypotonic
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
dna duplicates
Equations for circuits
Current = Charge*Time
Current = PD/resistance
Power=Current 2 x Resistance